51218230995 has 24 divisors (see below), whose sum is σ = 88784281872. Its totient is φ = 27314539200.

The previous prime is 51218230967. The next prime is 51218231021. The reversal of 51218230995 is 59903281215.

51218230995 is a `hidden beast` number, since 512 + 18 + 2 + 30 + 9 + 95 = 666.

It is not a de Polignac number, because 51218230995 - 2¹⁰ = 51218229971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51218230995.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 866485 + ... + 923705.

It is an arithmetic number, because the mean of its divisors is an integer number (3699345078).

Almost surely, 2^51218230995 is an apocalyptic number.

51218230995 is a deficient number, since it is larger than the sum of its proper divisors (37566050877).

51218230995 is a wasteful number, since it uses less digits than its factorization.

51218230995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77123 (or 77120 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 51218230995 in words is "fifty-one billion, two hundred eighteen million, two hundred thirty thousand, nine hundred ninety-five".