256252371 has 4 divisors (see below), whose sum is σ = 341669832. Its totient is φ = 170834912.

The previous prime is 256252363. The next prime is 256252391. The reversal of 256252371 is 173252652.

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 256252371 - 2³ = 256252363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256252301) 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, 42708726 + ... + 42708731.

It is an arithmetic number, because the mean of its divisors is an integer number (85417458).

Almost surely, 2^256252371 is an apocalyptic number.

256252371 is a deficient number, since it is larger than the sum of its proper divisors (85417461).

256252371 is an equidigital number, since it uses as much as digits as its factorization.

256252371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85417460.

The product of its digits is 25200, while the sum is 33.

The square root of 256252371 is about 16007.8846510087. The cubic root of 256252371 is about 635.1690053800.

The spelling of 256252371 in words is "two hundred fifty-six million, two hundred fifty-two thousand, three hundred seventy-one".