256451151 has 48 divisors (see below), whose sum is σ = 400574720. Its totient is φ = 145815120.

The previous prime is 256451149. The next prime is 256451197. The reversal of 256451151 is 151154652.

256451151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256451151 - 2¹ = 256451149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256451141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2489766 + ... + 2489868.

Almost surely, 2^256451151 is an apocalyptic number.

256451151 is a deficient number, since it is larger than the sum of its proper divisors (144123569).

256451151 is a wasteful number, since it uses less digits than its factorization.

256451151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 136 counting only the distinct ones).

The product of its digits is 6000, while the sum is 30.

The square root of 256451151 is about 16014.0922627541. The cubic root of 256451151 is about 635.3332006240. Note that the first 3 decimals are identical.

It can be divided in two parts, 25645 and 1151, that added together give a triangular number (26796 = T₂₃₁).

The spelling of 256451151 in words is "two hundred fifty-six million, four hundred fifty-one thousand, one hundred fifty-one".