256830951 has 32 divisors (see below), whose sum is σ = 397897920. Its totient is φ = 145926144.

The previous prime is 256830947. The next prime is 256831021. The reversal of 256830951 is 159038652.

It is not a de Polignac number, because 256830951 - 2² = 256830947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256830911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31485 + ... + 38793.

It is an arithmetic number, because the mean of its divisors is an integer number (12434310).

Almost surely, 2^256830951 is an apocalyptic number.

256830951 is a deficient number, since it is larger than the sum of its proper divisors (141066969).

256830951 is a wasteful number, since it uses less digits than its factorization.

256830951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7395.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 256830951 is about 16025.9461811152. The cubic root of 256830951 is about 635.6466853121.

The spelling of 256830951 in words is "two hundred fifty-six million, eight hundred thirty thousand, nine hundred fifty-one".