51779692 has 6 divisors (see below), whose sum is σ = 90614468. Its totient is φ = 25889844.

The previous prime is 51779669. The next prime is 51779701. The reversal of 51779692 is 29697715.

It is a happy number.

It is a super-2 number, since 2×51779692² = 5362273007229728, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6472458 + ... + 6472465.

Almost surely, 2^51779692 is an apocalyptic number.

It is an amenable number.

51779692 is a deficient number, since it is larger than the sum of its proper divisors (38834776).

51779692 is a wasteful number, since it uses less digits than its factorization.

51779692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12944927 (or 12944925 counting only the distinct ones).

The product of its digits is 238140, while the sum is 46.

The square root of 51779692 is about 7195.8107256931. The cubic root of 51779692 is about 372.7232528040.

The spelling of 51779692 in words is "fifty-one million, seven hundred seventy-nine thousand, six hundred ninety-two".