51930392 has 8 divisors (see below), whose sum is σ = 97369500. Its totient is φ = 25965192.

The previous prime is 51930391. The next prime is 51930397. The reversal of 51930392 is 29303915.

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

It is a super-2 number, since 2×51930392² = 5393531226547328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51930391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245642 + ... + 3245657.

Almost surely, 2^51930392 is an apocalyptic number.

It is an amenable number.

51930392 is a deficient number, since it is larger than the sum of its proper divisors (45439108).

51930392 is a wasteful number, since it uses less digits than its factorization.

51930392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6491305 (or 6491301 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 51930392 is about 7206.2744882498. The cubic root of 51930392 is about 373.0844947506.

The spelling of 51930392 in words is "fifty-one million, nine hundred thirty thousand, three hundred ninety-two".