51530631048 has 96 divisors (see below), whose sum is σ = 155480434200. Its totient is φ = 15308826624.

The previous prime is 51530631017. The next prime is 51530631071. The reversal of 51530631048 is 84013603515.

51530631048 is a `hidden beast` number, since 5 + 15 + 3 + 0 + 631 + 0 + 4 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 48744691524 + 2785939524 = 220782^2 + 52782^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 922065 + ... + 976352.

Almost surely, 2^51530631048 is an apocalyptic number.

51530631048 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

51530631048 is an abundant number, since it is smaller than the sum of its proper divisors (103949803152).

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

51530631048 is a wasteful number, since it uses less digits than its factorization.

51530631048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898471 (or 1898464 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 51530631048 in words is "fifty-one billion, five hundred thirty million, six hundred thirty-one thousand, forty-eight".