51864492 has 24 divisors (see below), whose sum is σ = 121149952. Its totient is φ = 17269200.

The previous prime is 51864469. The next prime is 51864511. The reversal of 51864492 is 29446815.

It is a self number, because there is not a number n which added to its sum of digits gives 51864492.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13017 + ... + 16527.

Almost surely, 2^51864492 is an apocalyptic number.

It is an amenable number.

51864492 is an abundant number, since it is smaller than the sum of its proper divisors (69285460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51864492 is a wasteful number, since it uses less digits than its factorization.

51864492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749 (or 4747 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 51864492 is about 7201.7006324895. The cubic root of 51864492 is about 372.9266124095.

The spelling of 51864492 in words is "fifty-one million, eight hundred sixty-four thousand, four hundred ninety-two".