51132420324 has 36 divisors (see below), whose sum is σ = 129268617660. Its totient is φ = 17041869120.

The previous prime is 51132420281. The next prime is 51132420347. The reversal of 51132420324 is 42302423115.

51132420324 is a `hidden beast` number, since 5 + 11 + 324 + 2 + 0 + 324 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9753537600 + 41378882724 = 98760^2 + 203418^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×51132420324² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191134 + ... + 372554.

It is an arithmetic number, because the mean of its divisors is an integer number (3590794935).

Almost surely, 2^51132420324 is an apocalyptic number.

It is an amenable number.

51132420324 is an abundant number, since it is smaller than the sum of its proper divisors (78136197336).

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

51132420324 is a wasteful number, since it uses less digits than its factorization.

51132420324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189260 (or 189255 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 51132420324 its reverse (42302423115), we get a palindrome (93434843439).

The spelling of 51132420324 in words is "fifty-one billion, one hundred thirty-two million, four hundred twenty thousand, three hundred twenty-four".