31918613241 has 16 divisors (see below), whose sum is σ = 43106722560. Its totient is φ = 21004913280.

The previous prime is 31918613197. The next prime is 31918613249. The reversal of 31918613241 is 14231681913.

It is not a de Polignac number, because 31918613241 - 2⁷ = 31918613113 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31918613241.

It is not an unprimeable number, because it can be changed into a prime (31918613249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1236931 + ... + 1262471.

It is an arithmetic number, because the mean of its divisors is an integer number (2694170160).

Almost surely, 2^31918613241 is an apocalyptic number.

It is an amenable number.

31918613241 is a deficient number, since it is larger than the sum of its proper divisors (11188109319).

31918613241 is a wasteful number, since it uses less digits than its factorization.

31918613241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30896.

The product of its digits is 31104, while the sum is 39.

The spelling of 31918613241 in words is "thirty-one billion, nine hundred eighteen million, six hundred thirteen thousand, two hundred forty-one".