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2053144021 = 3139765393
BaseRepresentation
bin111101001100000…
…0111110111010101
312022002100112010011
41322120013313111
513201101102041
6535422000221
7101610302425
oct17230076725
95262315104
102053144021
11963a45545
12493716071
13269493826
14156970485
15c03ade81
hex7a607dd5

2053144021 has 4 divisors (see below), whose sum is σ = 2053240812. Its totient is φ = 2053047232.

The previous prime is 2053143977. The next prime is 2053144031. The reversal of 2053144021 is 1204413502.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1204413502 = 2602206751.

It can be written as a sum of positive squares in 2 ways, for example, as 554602500 + 1498541521 = 23550^2 + 38711^2 .

It is a cyclic number.

It is not a de Polignac number, because 2053144021 - 27 = 2053143893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2053143983 and 2053144001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2053144031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300 + ... + 64093.

It is an arithmetic number, because the mean of its divisors is an integer number (513310203).

Almost surely, 22053144021 is an apocalyptic number.

It is an amenable number.

2053144021 is a deficient number, since it is larger than the sum of its proper divisors (96791).

2053144021 is an equidigital number, since it uses as much as digits as its factorization.

2053144021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96790.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2053144021 is about 45311.6322923816. The cubic root of 2053144021 is about 1270.9831849676.

Adding to 2053144021 its reverse (1204413502), we get a palindrome (3257557523).

The spelling of 2053144021 in words is "two billion, fifty-three million, one hundred forty-four thousand, twenty-one".

Divisors: 1 31397 65393 2053144021