51512510142 has 32 divisors (see below), whose sum is σ = 119449301760. Its totient is φ = 16424278200.

The previous prime is 51512510099. The next prime is 51512510143. The reversal of 51512510142 is 24101521515.

It is a happy number.

51512510142 is a `hidden beast` number, since 5 + 1 + 5 + 1 + 2 + 510 + 142 = 666.

It is a super-2 number, since 2×51512510142² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51512510143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20736484 + ... + 20738967.

It is an arithmetic number, because the mean of its divisors is an integer number (3732790680).

Almost surely, 2^51512510142 is an apocalyptic number.

51512510142 is an abundant number, since it is smaller than the sum of its proper divisors (67936791618).

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

51512510142 is a wasteful number, since it uses less digits than its factorization.

51512510142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41475485 (or 41475479 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The spelling of 51512510142 in words is "fifty-one billion, five hundred twelve million, five hundred ten thousand, one hundred forty-two".