256512222 has 24 divisors (see below), whose sum is σ = 556388976. Its totient is φ = 85409856.

The previous prime is 256512181. The next prime is 256512233. The reversal of 256512222 is 222215652.

256512222 is a `hidden beast` number, since 2 + 5 + 651 + 2 + 2 + 2 + 2 = 666.

256512222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10038 + ... + 24774.

It is an arithmetic number, because the mean of its divisors is an integer number (23182874).

Almost surely, 2^256512222 is an apocalyptic number.

256512222 is an abundant number, since it is smaller than the sum of its proper divisors (299876754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256512222 is a wasteful number, since it uses less digits than its factorization.

256512222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15712 (or 15709 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 256512222 is about 16015.9989385614. The cubic root of 256512222 is about 635.3836291419.

Adding to 256512222 its reverse (222215652), we get a palindrome (478727874).

The spelling of 256512222 in words is "two hundred fifty-six million, five hundred twelve thousand, two hundred twenty-two".