51531948260 has 24 divisors (see below), whose sum is σ = 116541483576. Its totient is φ = 19027180800.

The previous prime is 51531948239. The next prime is 51531948277. The reversal of 51531948260 is 6284913515.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6373148224 + 45158800036 = 79832^2 + 212506^2 .

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, 99099641 + ... + 99100160.

It is an arithmetic number, because the mean of its divisors is an integer number (4855895149).

Almost surely, 2^51531948260 is an apocalyptic number.

It is an amenable number.

51531948260 is an abundant number, since it is smaller than the sum of its proper divisors (65009535316).

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

51531948260 is a wasteful number, since it uses less digits than its factorization.

51531948260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198199823 (or 198199821 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 51531948260 in words is "fifty-one billion, five hundred thirty-one million, nine hundred forty-eight thousand, two hundred sixty".