31331013323 has 4 divisors (see below), whose sum is σ = 31336183560. Its totient is φ = 31325843088.

The previous prime is 31331013317. The next prime is 31331013347. The reversal of 31331013323 is 32331013313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32331013313 = 23 ⋅1405696231.

It is a cyclic number.

It is not a de Polignac number, because 31331013323 - 2¹⁶ = 31330947787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331013383) 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, 2576018 + ... + 2588151.

It is an arithmetic number, because the mean of its divisors is an integer number (7834045890).

Almost surely, 2^31331013323 is an apocalyptic number.

31331013323 is a deficient number, since it is larger than the sum of its proper divisors (5170237).

31331013323 is an equidigital number, since it uses as much as digits as its factorization.

31331013323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170236.

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 31331013323 its reverse (32331013313), we get a palindrome (63662026636).

The spelling of 31331013323 in words is "thirty-one billion, three hundred thirty-one million, thirteen thousand, three hundred twenty-three".