2256651631 has 4 divisors (see below), whose sum is σ = 2430240232. Its totient is φ = 2083063032.

The previous prime is 2256651619. The next prime is 2256651731. The reversal of 2256651631 is 1361566522.

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

It is a cyclic number.

It is not a de Polignac number, because 2256651631 - 2¹¹ = 2256649583 is a prime.

It is a super-2 number, since 2×2256651631² = 10184953167389920322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256651611) 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, 86794281 + ... + 86794306.

It is an arithmetic number, because the mean of its divisors is an integer number (607560058).

Almost surely, 2^2256651631 is an apocalyptic number.

2256651631 is a deficient number, since it is larger than the sum of its proper divisors (173588601).

2256651631 is a wasteful number, since it uses less digits than its factorization.

2256651631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173588600.

The product of its digits is 64800, while the sum is 37.

The square root of 2256651631 is about 47504.2275066125. The cubic root of 2256651631 is about 1311.6607011560.

The spelling of 2256651631 in words is "two billion, two hundred fifty-six million, six hundred fifty-one thousand, six hundred thirty-one".