51501431244 has 12 divisors (see below), whose sum is σ = 120170006264. Its totient is φ = 17167143744.

The previous prime is 51501431239. The next prime is 51501431257. The reversal of 51501431244 is 44213410515.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2145892957 + ... + 2145892980.

Almost surely, 2^51501431244 is an apocalyptic number.

It is an amenable number.

51501431244 is an abundant number, since it is smaller than the sum of its proper divisors (68668575020).

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

51501431244 is a wasteful number, since it uses less digits than its factorization.

51501431244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4291785944 (or 4291785942 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 51501431244 its reverse (44213410515), we get a palindrome (95714841759).

The spelling of 51501431244 in words is "fifty-one billion, five hundred one million, four hundred thirty-one thousand, two hundred forty-four".