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2261881 = 5342677
BaseRepresentation
bin1000101000001101111001
311020220201101
420220031321
51034340011
6120251401
725140256
oct10501571
94226641
102261881
111305426
12910b61
136126bb
1442c42d
152ea2c1
hex228379

2261881 has 4 divisors (see below), whose sum is σ = 2304612. Its totient is φ = 2219152.

The previous prime is 2261863. The next prime is 2261887. The reversal of 2261881 is 1881622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1478656 + 783225 = 1216^2 + 885^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261881 - 211 = 2259833 is a prime.

It is a super-2 number, since 2×22618812 = 10232211316322, which contains 22 as substring.

It is a Duffinian number.

2261881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2261887) 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, 21286 + ... + 21391.

It is an arithmetic number, because the mean of its divisors is an integer number (576153).

22261881 is an apocalyptic number.

It is an amenable number.

2261881 is a deficient number, since it is larger than the sum of its proper divisors (42731).

2261881 is an equidigital number, since it uses as much as digits as its factorization.

2261881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42730.

The product of its digits is 1536, while the sum is 28.

The square root of 2261881 is about 1503.9551190112. The cubic root of 2261881 is about 131.2673095840.

The spelling of 2261881 in words is "two million, two hundred sixty-one thousand, eight hundred eighty-one".

Divisors: 1 53 42677 2261881