51192920 has 16 divisors (see below), whose sum is σ = 115184160. Its totient is φ = 20477152.

The previous prime is 51192913. The next prime is 51192923. The reversal of 51192920 is 2929115.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51192923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639872 + ... + 639951.

It is an arithmetic number, because the mean of its divisors is an integer number (7199010).

Almost surely, 2^51192920 is an apocalyptic number.

It is an amenable number.

51192920 is an abundant number, since it is smaller than the sum of its proper divisors (63991240).

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

51192920 is a wasteful number, since it uses less digits than its factorization.

51192920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279834 (or 1279830 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 51192920 is about 7154.9227808552. The cubic root of 51192920 is about 371.3099900412.

The spelling of 51192920 in words is "fifty-one million, one hundred ninety-two thousand, nine hundred twenty".