256223504 has 10 divisors (see below), whose sum is σ = 496433070. Its totient is φ = 128111744.

The previous prime is 256223467. The next prime is 256223537. The reversal of 256223504 is 405322652.

It can be written as a sum of positive squares in only one way, i.e., 220463104 + 35760400 = 14848^2 + 5980^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8006969 + ... + 8007000.

It is an arithmetic number, because the mean of its divisors is an integer number (49643307).

Almost surely, 2^256223504 is an apocalyptic number.

It is an amenable number.

256223504 is a deficient number, since it is larger than the sum of its proper divisors (240209566).

256223504 is a wasteful number, since it uses less digits than its factorization.

256223504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16013977 (or 16013971 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 256223504 is about 16006.9829761889. The cubic root of 256223504 is about 635.1451537474.

The spelling of 256223504 in words is "two hundred fifty-six million, two hundred twenty-three thousand, five hundred four".