256120051 has 8 divisors (see below), whose sum is σ = 281078784. Its totient is φ = 231440520.

The previous prime is 256120049. The next prime is 256120097. The reversal of 256120051 is 150021652.

256120051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 256120051 - 2¹ = 256120049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256120001) 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, 67875 + ... + 71548.

It is an arithmetic number, because the mean of its divisors is an integer number (35134848).

Almost surely, 2^256120051 is an apocalyptic number.

256120051 is a deficient number, since it is larger than the sum of its proper divisors (24958733).

256120051 is a wasteful number, since it uses less digits than its factorization.

256120051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139601.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 256120051 is about 16003.7511540264. The cubic root of 256120051 is about 635.0596600073.

The spelling of 256120051 in words is "two hundred fifty-six million, one hundred twenty thousand, fifty-one".