51512154338 has 30 divisors (see below), whose sum is σ = 80324806155. Its totient is φ = 24775983060.

The previous prime is 51512154329. The next prime is 51512154341. The reversal of 51512154338 is 83345121515.

It can be written as a sum of positive squares in only one way, i.e., 25756077169 + 25756077169 = 160487^2 + 160487^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=160487.

It is a Duffinian number.

Its product of digits (72000) is a multiple of the sum of its prime divisors (200).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 308455931 + ... + 308456097.

Almost surely, 2^51512154338 is an apocalyptic number.

51512154338 is a deficient number, since it is larger than the sum of its proper divisors (28812651817).

51512154338 is an frugal number, since it uses more digits than its factorization.

51512154338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 200 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

The spelling of 51512154338 in words is "fifty-one billion, five hundred twelve million, one hundred fifty-four thousand, three hundred thirty-eight".