51530331204 has 72 divisors (see below), whose sum is σ = 144045431712. Its totient is φ = 15401335680.

The previous prime is 51530331187. The next prime is 51530331221. The reversal of 51530331204 is 40213303515.

51530331204 is a `hidden beast` number, since 5 + 1 + 530 + 3 + 3 + 120 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (51530331187) and next prime (51530331221).

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, 862374 + ... + 920189.

It is an arithmetic number, because the mean of its divisors is an integer number (2000630996).

Almost surely, 2^51530331204 is an apocalyptic number.

It is an amenable number.

51530331204 is an abundant number, since it is smaller than the sum of its proper divisors (92515100508).

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

51530331204 is a wasteful number, since it uses less digits than its factorization.

51530331204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782657 (or 1782652 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 51530331204 its reverse (40213303515), we get a palindrome (91743634719).

The spelling of 51530331204 in words is "fifty-one billion, five hundred thirty million, three hundred thirty-one thousand, two hundred four".