32031481681891 has 2 divisors, whose sum is σ = 32031481681892. Its totient is φ = 32031481681890.

The previous prime is 32031481681877. The next prime is 32031481681949. The reversal of 32031481681891 is 19818618413023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 32031481681891 - 2²⁷ = 32031347464163 is a prime.

It is a super-2 number, since 2×32031481681891² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (32031481681811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16015740840945 + 16015740840946.

It is an arithmetic number, because the mean of its divisors is an integer number (16015740840946).

Almost surely, 2^{32031481681891} is an apocalyptic number.

32031481681891 is a deficient number, since it is larger than the sum of its proper divisors (1).

32031481681891 is an equidigital number, since it uses as much as digits as its factorization.

32031481681891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 32031481681891 in words is "thirty-two trillion, thirty-one billion, four hundred eighty-one million, six hundred eighty-one thousand, eight hundred ninety-one".