51902920 has 16 divisors (see below), whose sum is σ = 116781660. Its totient is φ = 20761152.

The previous prime is 51902909. The next prime is 51902923. The reversal of 51902920 is 2920915.

It can be written as a sum of positive squares in 2 ways, for example, as 47416996 + 4485924 = 6886^2 + 2118^2 .

It is not an unprimeable number, because it can be changed into a prime (51902923) 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, 648747 + ... + 648826.

Almost surely, 2^51902920 is an apocalyptic number.

It is an amenable number.

51902920 is an abundant number, since it is smaller than the sum of its proper divisors (64878740).

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

51902920 is a wasteful number, since it uses less digits than its factorization.

51902920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297584 (or 1297580 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 51902920 is about 7204.3681194120. The cubic root of 51902920 is about 373.0186939434.

The spelling of 51902920 in words is "fifty-one million, nine hundred two thousand, nine hundred twenty".