51555404313 has 80 divisors (see below), whose sum is σ = 90194011776. Its totient is φ = 28733564160.

The previous prime is 51555404311. The next prime is 51555404317. The reversal of 51555404313 is 31340455515.

51555404313 is a `hidden beast` number, since 51 + 5 + 554 + 0 + 43 + 13 = 666.

It is not a de Polignac number, because 51555404313 - 2¹ = 51555404311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51555404311) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 25867245 + ... + 25869237.

Almost surely, 2^51555404313 is an apocalyptic number.

It is an amenable number.

51555404313 is a deficient number, since it is larger than the sum of its proper divisors (38638607463).

51555404313 is a wasteful number, since it uses less digits than its factorization.

51555404313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116 (or 3107 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

Adding to 51555404313 its reverse (31340455515), we get a palindrome (82895859828).

The spelling of 51555404313 in words is "fifty-one billion, five hundred fifty-five million, four hundred four thousand, three hundred thirteen".