31312403413 has 4 divisors (see below), whose sum is σ = 31353767980. Its totient is φ = 31271038848.

The previous prime is 31312403383. The next prime is 31312403431. The reversal of 31312403413 is 31430421313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31430421313 = 2029 ⋅15490597.

It can be written as a sum of positive squares in 2 ways, for example, as 19378588849 + 11933814564 = 139207^2 + 109242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31312403413 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 (31312403443) 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, 20681148 + ... + 20682661.

It is an arithmetic number, because the mean of its divisors is an integer number (7838441995).

Almost surely, 2^31312403413 is an apocalyptic number.

It is an amenable number.

31312403413 is a deficient number, since it is larger than the sum of its proper divisors (41364567).

31312403413 is an equidigital number, since it uses as much as digits as its factorization.

31312403413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41364566.

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

Adding to 31312403413 its reverse (31430421313), we get a palindrome (62742824726).

The spelling of 31312403413 in words is "thirty-one billion, three hundred twelve million, four hundred three thousand, four hundred thirteen".