31112322313 has 4 divisors (see below), whose sum is σ = 31137597568. Its totient is φ = 31087047060.

The previous prime is 31112322299. The next prime is 31112322317. The reversal of 31112322313 is 31322321113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31112322313 - 2²¹ = 31110225161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31112322317) 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, 12635781 + ... + 12638242.

It is an arithmetic number, because the mean of its divisors is an integer number (7784399392).

Almost surely, 2^31112322313 is an apocalyptic number.

It is an amenable number.

31112322313 is a deficient number, since it is larger than the sum of its proper divisors (25275255).

31112322313 is a wasteful number, since it uses less digits than its factorization.

31112322313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25275254.

The product of its digits is 648, while the sum is 22.

Adding to 31112322313 its reverse (31322321113), we get a palindrome (62434643426).

The spelling of 31112322313 in words is "thirty-one billion, one hundred twelve million, three hundred twenty-two thousand, three hundred thirteen".