2256351513631 has 4 divisors (see below), whose sum is σ = 2257872992872. Its totient is φ = 2254830034392.

The previous prime is 2256351513571. The next prime is 2256351513677. The reversal of 2256351513631 is 1363151536522.

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 2256351513631 - 2⁷ = 2256351513503 is a prime.

It is a super-2 number, since 2×2256351513631² (a number of 26 digits) 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 (2256351513431) 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, 760737396 + ... + 760740361.

It is an arithmetic number, because the mean of its divisors is an integer number (564468248218).

Almost surely, 2^{2256351513631} is an apocalyptic number.

2256351513631 is a deficient number, since it is larger than the sum of its proper divisors (1521479241).

2256351513631 is a wasteful number, since it uses less digits than its factorization.

2256351513631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521479240.

The product of its digits is 486000, while the sum is 43.

The spelling of 2256351513631 in words is "two trillion, two hundred fifty-six billion, three hundred fifty-one million, five hundred thirteen thousand, six hundred thirty-one".