51289256 has 8 divisors (see below), whose sum is σ = 96167370. Its totient is φ = 25644624.

The previous prime is 51289243. The next prime is 51289297. The reversal of 51289256 is 65298215.

It can be written as a sum of positive squares in only one way, i.e., 49140100 + 2149156 = 7010^2 + 1466^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205571 + ... + 3205586.

Almost surely, 2^51289256 is an apocalyptic number.

It is an amenable number.

51289256 is a deficient number, since it is larger than the sum of its proper divisors (44878114).

51289256 is a wasteful number, since it uses less digits than its factorization.

51289256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6411163 (or 6411159 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 51289256 is about 7161.6517647816. The cubic root of 51289256 is about 371.5427572852.

The spelling of 51289256 in words is "fifty-one million, two hundred eighty-nine thousand, two hundred fifty-six".