51915592 has 8 divisors (see below), whose sum is σ = 97341750. Its totient is φ = 25957792.

The previous prime is 51915571. The next prime is 51915641. The reversal of 51915592 is 29551915.

It can be written as a sum of positive squares in only one way, i.e., 42588676 + 9326916 = 6526^2 + 3054^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3244717 + ... + 3244732.

Almost surely, 2^51915592 is an apocalyptic number.

It is an amenable number.

51915592 is a deficient number, since it is larger than the sum of its proper divisors (45426158).

51915592 is a wasteful number, since it uses less digits than its factorization.

51915592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489455 (or 6489451 counting only the distinct ones).

The product of its digits is 20250, while the sum is 37.

The square root of 51915592 is about 7205.2475321810. The cubic root of 51915592 is about 373.0490487433.

The spelling of 51915592 in words is "fifty-one million, nine hundred fifteen thousand, five hundred ninety-two".