31432104020113 has 4 divisors (see below), whose sum is σ = 31432120463140. Its totient is φ = 31432087577088.

The previous prime is 31432104020081. The next prime is 31432104020147. The reversal of 31432104020113 is 31102040123413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18051893557504 + 13380210462609 = 4248752^2 + 3657897^2 .

It is a cyclic number.

It is not a de Polignac number, because 31432104020113 - 2⁵ = 31432104020081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31432104020173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4909368 + ... + 9325561.

It is an arithmetic number, because the mean of its divisors is an integer number (7858030115785).

Almost surely, 2^{31432104020113} is an apocalyptic number.

It is an amenable number.

31432104020113 is a deficient number, since it is larger than the sum of its proper divisors (16443027).

31432104020113 is a wasteful number, since it uses less digits than its factorization.

31432104020113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16443026.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31432104020113 its reverse (31102040123413), we get a palindrome (62534144143526).

The spelling of 31432104020113 in words is "thirty-one trillion, four hundred thirty-two billion, one hundred four million, twenty thousand, one hundred thirteen".