51601688517031 has 2 divisors, whose sum is σ = 51601688517032. Its totient is φ = 51601688517030.

The previous prime is 51601688516971. The next prime is 51601688517059. The reversal of 51601688517031 is 13071588610615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51601688517031 - 2⁹ = 51601688516519 is a prime.

It is a super-2 number, since 2×51601688517031² (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 51601688517031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51601688517091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25800844258515 + 25800844258516.

It is an arithmetic number, because the mean of its divisors is an integer number (25800844258516).

Almost surely, 2^{51601688517031} is an apocalyptic number.

51601688517031 is a deficient number, since it is larger than the sum of its proper divisors (1).

51601688517031 is an equidigital number, since it uses as much as digits as its factorization.

51601688517031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 52.

The spelling of 51601688517031 in words is "fifty-one trillion, six hundred one billion, six hundred eighty-eight million, five hundred seventeen thousand, thirty-one".