51188814653731 has 2 divisors, whose sum is σ = 51188814653732. Its totient is φ = 51188814653730.

The previous prime is 51188814653723. The next prime is 51188814653761. The reversal of 51188814653731 is 13735641888115.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51188814653731 - 2³ = 51188814653723 is a prime.

It is a super-2 number, since 2×51188814653731² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51188814653731.

It is not a weakly prime, because it can be changed into another prime (51188814653701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25594407326865 + 25594407326866.

It is an arithmetic number, because the mean of its divisors is an integer number (25594407326866).

Almost surely, 2^{51188814653731} is an apocalyptic number.

51188814653731 is a deficient number, since it is larger than the sum of its proper divisors (1).

51188814653731 is an equidigital number, since it uses as much as digits as its factorization.

51188814653731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19353600, while the sum is 61.

The spelling of 51188814653731 in words is "fifty-one trillion, one hundred eighty-eight billion, eight hundred fourteen million, six hundred fifty-three thousand, seven hundred thirty-one".