256215772 has 24 divisors (see below), whose sum is σ = 481847184. Its totient is φ = 118770432.

The previous prime is 256215719. The next prime is 256215797. The reversal of 256215772 is 277512652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23563 + ... + 32674.

It is an arithmetic number, because the mean of its divisors is an integer number (20076966).

Almost surely, 2^256215772 is an apocalyptic number.

It is an amenable number.

256215772 is a deficient number, since it is larger than the sum of its proper divisors (225631412).

256215772 is a wasteful number, since it uses less digits than its factorization.

256215772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56325 (or 56323 counting only the distinct ones).

The product of its digits is 58800, while the sum is 37.

The square root of 256215772 is about 16006.7414547746. The cubic root of 256215772 is about 635.1387648048.

The spelling of 256215772 in words is "two hundred fifty-six million, two hundred fifteen thousand, seven hundred seventy-two".