51555115451 has 8 divisors (see below), whose sum is σ = 62021191680. Its totient is φ = 41864304168.

The previous prime is 51555115379. The next prime is 51555115453. The reversal of 51555115451 is 15451155515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51555115451 - 2³⁰ = 50481373627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51555115453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193816091 + ... + 193816356.

It is an arithmetic number, because the mean of its divisors is an integer number (7752648960).

Almost surely, 2^51555115451 is an apocalyptic number.

51555115451 is a deficient number, since it is larger than the sum of its proper divisors (10466076229).

51555115451 is a wasteful number, since it uses less digits than its factorization.

51555115451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387632473.

The product of its digits is 62500, while the sum is 38.

The spelling of 51555115451 in words is "fifty-one billion, five hundred fifty-five million, one hundred fifteen thousand, four hundred fifty-one".