51651488 has 36 divisors (see below), whose sum is σ = 118294722. Its totient is φ = 22135680.

The previous prime is 51651473. The next prime is 51651493. The reversal of 51651488 is 88415615.

It can be written as a sum of positive squares in only one way, i.e., 34245904 + 17405584 = 5852^2 + 4172^2 .

It is a super-2 number, since 2×51651488² = 5335752425228288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14903 + ... + 18038.

Almost surely, 2^51651488 is an apocalyptic number.

It is an amenable number.

51651488 is an abundant number, since it is smaller than the sum of its proper divisors (66643234).

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

51651488 is a wasteful number, since it uses less digits than its factorization.

51651488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32965 (or 32950 counting only the distinct ones).

The product of its digits is 38400, while the sum is 38.

The square root of 51651488 is about 7186.8969660070. The cubic root of 51651488 is about 372.4153836900.

The spelling of 51651488 in words is "fifty-one million, six hundred fifty-one thousand, four hundred eighty-eight".