51216842509325 has 12 divisors (see below), whose sum is σ = 67244701459860. Its totient is φ = 38563269653760.

The previous prime is 51216842509307. The next prime is 51216842509331. The reversal of 51216842509325 is 52390524861215.

It can be written as a sum of positive squares in 6 ways, for example, as 7050543741796 + 44166298767529 = 2655286^2 + 6645773^2 .

It is not a de Polignac number, because 51216842509325 - 2¹² = 51216842505229 is a prime.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60255108410 + ... + 60255109259.

It is an arithmetic number, because the mean of its divisors is an integer number (5603725121655).

Almost surely, 2^{51216842509325} is an apocalyptic number.

It is an amenable number.

51216842509325 is a deficient number, since it is larger than the sum of its proper divisors (16027858950535).

51216842509325 is a wasteful number, since it uses less digits than its factorization.

51216842509325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120510217696 (or 120510217691 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 53.

The spelling of 51216842509325 in words is "fifty-one trillion, two hundred sixteen billion, eight hundred forty-two million, five hundred nine thousand, three hundred twenty-five".