51206992 has 20 divisors (see below), whose sum is σ = 105050196. Its totient is φ = 24097280.

The previous prime is 51206989. The next prime is 51207029. The reversal of 51206992 is 29960215.

It can be written as a sum of positive squares in 2 ways, for example, as 44836416 + 6370576 = 6696^2 + 2524^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93859 + ... + 94402.

Almost surely, 2^51206992 is an apocalyptic number.

It is an amenable number.

51206992 is an abundant number, since it is smaller than the sum of its proper divisors (53843204).

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

51206992 is a wasteful number, since it uses less digits than its factorization.

51206992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188286 (or 188280 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 51206992 is about 7155.9060921731. The cubic root of 51206992 is about 371.3440090390.

The spelling of 51206992 in words is "fifty-one million, two hundred six thousand, nine hundred ninety-two".