51656692 has 6 divisors (see below), whose sum is σ = 90399218. Its totient is φ = 25828344.

The previous prime is 51656681. The next prime is 51656701. The reversal of 51656692 is 29665615.

It can be written as a sum of positive squares in only one way, i.e., 35688676 + 15968016 = 5974^2 + 3996^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6457083 + ... + 6457090.

Almost surely, 2^51656692 is an apocalyptic number.

It is an amenable number.

51656692 is a deficient number, since it is larger than the sum of its proper divisors (38742526).

51656692 is a wasteful number, since it uses less digits than its factorization.

51656692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12914177 (or 12914175 counting only the distinct ones).

The product of its digits is 97200, while the sum is 40.

The square root of 51656692 is about 7187.2590046554. The cubic root of 51656692 is about 372.4278904905.

The spelling of 51656692 in words is "fifty-one million, six hundred fifty-six thousand, six hundred ninety-two".