51431345040 has 40 divisors (see below), whose sum is σ = 159437170368. Its totient is φ = 13715025280.

The previous prime is 51431344999. The next prime is 51431345123. The reversal of 51431345040 is 4054313415.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51431344989 and 51431345007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107148396 + ... + 107148875.

Almost surely, 2^51431345040 is an apocalyptic number.

It is an amenable number.

51431345040 is an abundant number, since it is smaller than the sum of its proper divisors (108005825328).

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

51431345040 is a wasteful number, since it uses less digits than its factorization.

51431345040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214297287 (or 214297281 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 51431345040 its reverse (4054313415), we get a palindrome (55485658455).

The spelling of 51431345040 in words is "fifty-one billion, four hundred thirty-one million, three hundred forty-five thousand, forty".