256262805031 has 4 divisors (see below), whose sum is σ = 262222405192. Its totient is φ = 250303204872.

The previous prime is 256262805023. The next prime is 256262805041. The reversal of 256262805031 is 130508262652.

It is a happy number.

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 256262805031 - 2³ = 256262805023 is a prime.

It is a super-2 number, since 2×256262805031² (a number of 24 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 (256262805041) 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, 2979800016 + ... + 2979800101.

It is an arithmetic number, because the mean of its divisors is an integer number (65555601298).

Almost surely, 2^256262805031 is an apocalyptic number.

256262805031 is a deficient number, since it is larger than the sum of its proper divisors (5959600161).

256262805031 is an equidigital number, since it uses as much as digits as its factorization.

256262805031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959600160.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 256262805031 in words is "two hundred fifty-six billion, two hundred sixty-two million, eight hundred five thousand, thirty-one".