51137668 has 12 divisors (see below), whose sum is σ = 90717340. Its totient is φ = 25218432.

The previous prime is 51137651. The next prime is 51137729. The reversal of 51137668 is 86673115.

It can be written as a sum of positive squares in 2 ways, for example, as 32058244 + 19079424 = 5662^2 + 4368^2 .

It is a super-2 number, since 2×51137668² = 5230122176956448, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 87273 + ... + 87856.

Almost surely, 2^51137668 is an apocalyptic number.

It is an amenable number.

51137668 is a deficient number, since it is larger than the sum of its proper divisors (39579672).

51137668 is a wasteful number, since it uses less digits than its factorization.

51137668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175206 (or 175204 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 51137668 is about 7151.0606206352. The cubic root of 51137668 is about 371.1763582502.

The spelling of 51137668 in words is "fifty-one million, one hundred thirty-seven thousand, six hundred sixty-eight".