256452031 has 16 divisors (see below), whose sum is σ = 283969440. Its totient is φ = 229662720.

The previous prime is 256452023. The next prime is 256452041. The reversal of 256452031 is 130254652.

It is a cyclic number.

It is not a de Polignac number, because 256452031 - 2³ = 256452023 is a prime.

It is a super-2 number, since 2×256452031² = 131535288408049922, 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 (256452041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239365 + ... + 240433.

It is an arithmetic number, because the mean of its divisors is an integer number (17748090).

Almost surely, 2^256452031 is an apocalyptic number.

256452031 is a deficient number, since it is larger than the sum of its proper divisors (27517409).

256452031 is a wasteful number, since it uses less digits than its factorization.

256452031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 256452031 is about 16014.1197385307. The cubic root of 256452031 is about 635.3339273285. Note that the first 3 decimals are identical.

The spelling of 256452031 in words is "two hundred fifty-six million, four hundred fifty-two thousand, thirty-one".