31913641193 has 4 divisors (see below), whose sum is σ = 36472732800. Its totient is φ = 27354549588.

The previous prime is 31913641163. The next prime is 31913641217. The reversal of 31913641193 is 39114631913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39114631913 = 7 ⋅5587804559.

It is a cyclic number.

It is not a de Polignac number, because 31913641193 - 2¹⁸ = 31913379049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31913641193.

It is not an unprimeable number, because it can be changed into a prime (31913641163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2279545793 + ... + 2279545806.

It is an arithmetic number, because the mean of its divisors is an integer number (9118183200).

Almost surely, 2^31913641193 is an apocalyptic number.

It is an amenable number.

31913641193 is a deficient number, since it is larger than the sum of its proper divisors (4559091607).

31913641193 is an equidigital number, since it uses as much as digits as its factorization.

31913641193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4559091606.

The product of its digits is 52488, while the sum is 41.

The spelling of 31913641193 in words is "thirty-one billion, nine hundred thirteen million, six hundred forty-one thousand, one hundred ninety-three".