51213515152 has 40 divisors (see below), whose sum is σ = 99927007040. Its totient is φ = 25426051200.

The previous prime is 51213515123. The next prime is 51213515153. The reversal of 51213515152 is 25151531215.

It is not an unprimeable number, because it can be changed into a prime (51213515153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9886099 + ... + 9891277.

It is an arithmetic number, because the mean of its divisors is an integer number (2498175176).

Almost surely, 2^51213515152 is an apocalyptic number.

It is an amenable number.

51213515152 is a deficient number, since it is larger than the sum of its proper divisors (48713491888).

51213515152 is a wasteful number, since it uses less digits than its factorization.

51213515152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431 (or 9425 counting only the distinct ones).

The product of its digits is 7500, while the sum is 31.

The spelling of 51213515152 in words is "fifty-one billion, two hundred thirteen million, five hundred fifteen thousand, one hundred fifty-two".