256463131 has 4 divisors (see below), whose sum is σ = 261302112. Its totient is φ = 251624152.

The previous prime is 256463117. The next prime is 256463143. The reversal of 256463131 is 131364652.

256463131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 256463131 - 2¹¹ = 256461083 is a prime.

It is a super-2 number, since 2×256463131² = 131546675124646322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256463093 and 256463102.

It is not an unprimeable number, because it can be changed into a prime (256463231) 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, 2419411 + ... + 2419516.

It is an arithmetic number, because the mean of its divisors is an integer number (65325528).

Almost surely, 2^256463131 is an apocalyptic number.

256463131 is a deficient number, since it is larger than the sum of its proper divisors (4838981).

256463131 is an equidigital number, since it uses as much as digits as its factorization.

256463131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4838980.

The product of its digits is 12960, while the sum is 31.

The square root of 256463131 is about 16014.4663039391. The cubic root of 256463131 is about 635.3430935714.

The spelling of 256463131 in words is "two hundred fifty-six million, four hundred sixty-three thousand, one hundred thirty-one".