256211233431 has 16 divisors (see below), whose sum is σ = 343080852480. Its totient is φ = 170074704800.

The previous prime is 256211233417. The next prime is 256211233477. The reversal of 256211233431 is 134332112652.

It is a cyclic number.

It is not a de Polignac number, because 256211233431 - 2⁷ = 256211233303 is a prime.

It is a super-2 number, since 2×256211233431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256211233392 and 256211233401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256211233331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12107446 + ... + 12128588.

It is an arithmetic number, because the mean of its divisors is an integer number (21442553280).

Almost surely, 2^256211233431 is an apocalyptic number.

256211233431 is a deficient number, since it is larger than the sum of its proper divisors (86869619049).

256211233431 is a wasteful number, since it uses less digits than its factorization.

256211233431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38286.

The product of its digits is 25920, while the sum is 33.

The spelling of 256211233431 in words is "two hundred fifty-six billion, two hundred eleven million, two hundred thirty-three thousand, four hundred thirty-one".