51665036 has 12 divisors (see below), whose sum is σ = 92120112. Its totient is φ = 25345008.

The previous prime is 51665021. The next prime is 51665039. The reversal of 51665036 is 63056615.

It is a junction number, because it is equal to n+sod(n) for n = 51664993 and 51665011.

It is not an unprimeable number, because it can be changed into a prime (51665039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121640 + ... + 122063.

It is an arithmetic number, because the mean of its divisors is an integer number (7676676).

Almost surely, 2^51665036 is an apocalyptic number.

It is an amenable number.

51665036 is a deficient number, since it is larger than the sum of its proper divisors (40455076).

51665036 is a wasteful number, since it uses less digits than its factorization.

51665036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243760 (or 243758 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 51665036 is about 7187.8394528537. The cubic root of 51665036 is about 372.4479419165.

The spelling of 51665036 in words is "fifty-one million, six hundred sixty-five thousand, thirty-six".