31132322413 has 4 divisors (see below), whose sum is σ = 31132772188. Its totient is φ = 31131872640.

The previous prime is 31132322387. The next prime is 31132322447. The reversal of 31132322413 is 31422323113.

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 20304255049 + 10828067364 = 142493^2 + 104058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31132322413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31132322213) 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, 96708 + ... + 267613.

It is an arithmetic number, because the mean of its divisors is an integer number (7783193047).

Almost surely, 2^31132322413 is an apocalyptic number.

It is an amenable number.

31132322413 is a deficient number, since it is larger than the sum of its proper divisors (449775).

31132322413 is an equidigital number, since it uses as much as digits as its factorization.

31132322413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449774.

The product of its digits is 2592, while the sum is 25.

Adding to 31132322413 its reverse (31422323113), we get a palindrome (62554645526).

The spelling of 31132322413 in words is "thirty-one billion, one hundred thirty-two million, three hundred twenty-two thousand, four hundred thirteen".