51311165652425 has 24 divisors (see below), whose sum is σ = 74262384926976. Its totient is φ = 34436186547840.

The previous prime is 51311165652377. The next prime is 51311165652427. The reversal of 51311165652425 is 52425656111315.

It is not a de Polignac number, because 51311165652425 - 2⁶ = 51311165652361 is a prime.

It is a super-2 number, since 2×51311165652425² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51311165652425.

It is not an unprimeable number, because it can be changed into a prime (51311165652427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3119211572 + ... + 3119228021.

It is an arithmetic number, because the mean of its divisors is an integer number (3094266038624).

Almost surely, 2^{51311165652425} is an apocalyptic number.

It is an amenable number.

51311165652425 is a deficient number, since it is larger than the sum of its proper divisors (22951219274551).

51311165652425 is a wasteful number, since it uses less digits than its factorization.

51311165652425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6238439657 (or 6238439652 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 47.

The spelling of 51311165652425 in words is "fifty-one trillion, three hundred eleven billion, one hundred sixty-five million, six hundred fifty-two thousand, four hundred twenty-five".