256331423 has 4 divisors (see below), whose sum is σ = 271409760. Its totient is φ = 241253088.

The previous prime is 256331419. The next prime is 256331431. The reversal of 256331423 is 324133652.

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 256331423 - 2² = 256331419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256331443) 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, 7539143 + ... + 7539176.

It is an arithmetic number, because the mean of its divisors is an integer number (67852440).

Almost surely, 2^256331423 is an apocalyptic number.

256331423 is a deficient number, since it is larger than the sum of its proper divisors (15078337).

256331423 is a wasteful number, since it uses less digits than its factorization.

256331423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15078336.

The product of its digits is 12960, while the sum is 29.

The square root of 256331423 is about 16010.3536188305. The cubic root of 256331423 is about 635.2343136769.

The spelling of 256331423 in words is "two hundred fifty-six million, three hundred thirty-one thousand, four hundred twenty-three".