51512242320 has 240 divisors, whose sum is σ = 215682659712. Its totient is φ = 10703831040.

The previous prime is 51512242319. The next prime is 51512242333. The reversal of 51512242320 is 2324221515.

51512242320 is a `hidden beast` number, since 51 + 51 + 2 + 242 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×51512242320² (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 47 ways as a sum of consecutive naturals, for example, 409137 + ... + 520016.

Almost surely, 2^51512242320 is an apocalyptic number.

It is an amenable number.

51512242320 is an abundant number, since it is smaller than the sum of its proper divisors (164170417392).

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

51512242320 is a wasteful number, since it uses less digits than its factorization.

51512242320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929190 (or 929181 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 51512242320 its reverse (2324221515), we get a palindrome (53836463835).

The spelling of 51512242320 in words is "fifty-one billion, five hundred twelve million, two hundred forty-two thousand, three hundred twenty".