1054205221 has 4 divisors (see below), whose sum is σ = 1082697292. Its totient is φ = 1025713152.

The previous prime is 1054205197. The next prime is 1054205227. The reversal of 1054205221 is 1225024501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1225024501 = 617 ⋅1985453.

It can be written as a sum of positive squares in 2 ways, for example, as 1019524900 + 34680321 = 31930^2 + 5889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1054205221 - 2⁷ = 1054205093 is a prime.

It is a super-2 number, since 2×1054205221² = 2222697295967317682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1054205192 and 1054205201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1054205227) 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, 14245980 + ... + 14246053.

It is an arithmetic number, because the mean of its divisors is an integer number (270674323).

Almost surely, 2^1054205221 is an apocalyptic number.

It is an amenable number.

1054205221 is a deficient number, since it is larger than the sum of its proper divisors (28492071).

1054205221 is an equidigital number, since it uses as much as digits as its factorization.

1054205221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28492070.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1054205221 is about 32468.5266219458. The cubic root of 1054205221 is about 1017.7514291915.

Adding to 1054205221 its reverse (1225024501), we get a palindrome (2279229722).

The spelling of 1054205221 in words is "one billion, fifty-four million, two hundred five thousand, two hundred twenty-one".