256522851 has 24 divisors (see below), whose sum is σ = 407534400. Its totient is φ = 154498176.

The previous prime is 256522837. The next prime is 256522853. The reversal of 256522851 is 158225652.

It is a happy number.

256522851 is a `hidden beast` number, since 2 + 56 + 522 + 85 + 1 = 666.

It is not a de Polignac number, because 256522851 - 2⁹ = 256522339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256522853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17826 + ... + 28823.

It is an arithmetic number, because the mean of its divisors is an integer number (16980600).

Almost surely, 2^256522851 is an apocalyptic number.

256522851 is a deficient number, since it is larger than the sum of its proper divisors (151011549).

256522851 is a wasteful number, since it uses less digits than its factorization.

256522851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46715 (or 46712 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 256522851 is about 16016.3307595716. The cubic root of 256522851 is about 635.3924050711.

The spelling of 256522851 in words is "two hundred fifty-six million, five hundred twenty-two thousand, eight hundred fifty-one".