256319151 has 8 divisors (see below), whose sum is σ = 372827904. Its totient is φ = 155344920.

The previous prime is 256319131. The next prime is 256319171. The reversal of 256319151 is 151913652.

It is an interprime number because it is at equal distance from previous prime (256319131) and next prime (256319171).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256319151 - 2¹⁸ = 256057007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 7767247 = 256319151 / (2 + 5 + 6 + 3 + 1 + 9 + 1 + 5 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256319111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3883591 + ... + 3883656.

It is an arithmetic number, because the mean of its divisors is an integer number (46603488).

Almost surely, 2^256319151 is an apocalyptic number.

256319151 is a deficient number, since it is larger than the sum of its proper divisors (116508753).

256319151 is a wasteful number, since it uses less digits than its factorization.

256319151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7767261.

The product of its digits is 8100, while the sum is 33.

The square root of 256319151 is about 16009.9703622461. The cubic root of 256319151 is about 635.2241761242.

The spelling of 256319151 in words is "two hundred fifty-six million, three hundred nineteen thousand, one hundred fifty-one".