51240104551431 has 20 divisors (see below), whose sum is σ = 81046439880912. Its totient is φ = 32150653835328.

The previous prime is 51240104551421. The next prime is 51240104551439. The reversal of 51240104551431 is 13415540104215.

51240104551431 is a `hidden beast` number, since 5 + 1 + 2 + 4 + 0 + 104 + 5 + 514 + 31 = 666.

It is not a de Polignac number, because 51240104551431 - 2⁶ = 51240104551367 is a prime.

It is a super-2 number, since 2×51240104551431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51240104551439) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18605701075 + ... + 18605703828.

Almost surely, 2^{51240104551431} is an apocalyptic number.

51240104551431 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51240104551431 is a deficient number, since it is larger than the sum of its proper divisors (29806335329481).

51240104551431 is a wasteful number, since it uses less digits than its factorization.

51240104551431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37211404932 (or 37211404923 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

Adding to 51240104551431 its reverse (13415540104215), we get a palindrome (64655644655646).

The spelling of 51240104551431 in words is "fifty-one trillion, two hundred forty billion, one hundred four million, five hundred fifty-one thousand, four hundred thirty-one".