51215214145522 has 16 divisors (see below), whose sum is σ = 90170415639360. Its totient is φ = 21356151072048.

The previous prime is 51215214145493. The next prime is 51215214145549. The reversal of 51215214145522 is 22554141251215.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49435534372 + ... + 49435535407.

It is an arithmetic number, because the mean of its divisors is an integer number (5635650977460).

Almost surely, 2^{51215214145522} is an apocalyptic number.

51215214145522 is a deficient number, since it is larger than the sum of its proper divisors (38955201493838).

51215214145522 is a wasteful number, since it uses less digits than its factorization.

51215214145522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98871069825.

The product of its digits is 160000, while the sum is 40.

Adding to 51215214145522 its reverse (22554141251215), we get a palindrome (73769355396737).

The spelling of 51215214145522 in words is "fifty-one trillion, two hundred fifteen billion, two hundred fourteen million, one hundred forty-five thousand, five hundred twenty-two".