51551131404 has 24 divisors (see below), whose sum is σ = 120696513840. Its totient is φ = 17125061824.

The previous prime is 51551131399. The next prime is 51551131453. The reversal of 51551131404 is 40413115515.

It is a super-2 number, since 2×51551131404² (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 7 ways as a sum of consecutive naturals, for example, 7327419 + ... + 7334450.

It is an arithmetic number, because the mean of its divisors is an integer number (5029021410).

Almost surely, 2^51551131404 is an apocalyptic number.

It is an amenable number.

51551131404 is an abundant number, since it is smaller than the sum of its proper divisors (69145382436).

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

51551131404 is a wasteful number, since it uses less digits than its factorization.

51551131404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14662169 (or 14662167 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 51551131404 its reverse (40413115515), we get a palindrome (91964246919).

The spelling of 51551131404 in words is "fifty-one billion, five hundred fifty-one million, one hundred thirty-one thousand, four hundred four".