51668552 has 16 divisors (see below), whose sum is σ = 104330940. Its totient is φ = 23846976.

The previous prime is 51668531. The next prime is 51668563. The reversal of 51668552 is 25586615.

It can be written as a sum of positive squares in 2 ways, for example, as 47803396 + 3865156 = 6914^2 + 1966^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248303 + ... + 248510.

Almost surely, 2^51668552 is an apocalyptic number.

51668552 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51668552 is an abundant number, since it is smaller than the sum of its proper divisors (52662388).

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

51668552 is a wasteful number, since it uses less digits than its factorization.

51668552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496832 (or 496828 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

The square root of 51668552 is about 7188.0840284460. The cubic root of 51668552 is about 372.4563905526.

The spelling of 51668552 in words is "fifty-one million, six hundred sixty-eight thousand, five hundred fifty-two".