2261339256 has 128 divisors (see below), whose sum is σ = 6426604800. Its totient is φ = 657024000.

The previous prime is 2261339251. The next prime is 2261339257. The reversal of 2261339256 is 6529331622.

It is a super-2 number, since 2×2261339256² = 10227310461453267072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261339251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 636846 + ... + 640386.

It is an arithmetic number, because the mean of its divisors is an integer number (50207850).

Almost surely, 2^2261339256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2261339256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3213302400).

2261339256 is an abundant number, since it is smaller than the sum of its proper divisors (4165265544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2261339256 is a wasteful number, since it uses less digits than its factorization.

2261339256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661 (or 3657 counting only the distinct ones).

The product of its digits is 116640, while the sum is 39.

The square root of 2261339256 is about 47553.5409407123. The cubic root of 2261339256 is about 1312.5682878574.

The spelling of 2261339256 in words is "two billion, two hundred sixty-one million, three hundred thirty-nine thousand, two hundred fifty-six".