31322112031 has 4 divisors (see below), whose sum is σ = 35796699472. Its totient is φ = 26847524592.

The previous prime is 31322112023. The next prime is 31322112037. The reversal of 31322112031 is 13021122313.

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

It is not a de Polignac number, because 31322112031 - 2³ = 31322112023 is a prime.

It is a super-2 number, since 2×31322112031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322112037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2237293710 + ... + 2237293723.

It is an arithmetic number, because the mean of its divisors is an integer number (8949174868).

Almost surely, 2^31322112031 is an apocalyptic number.

31322112031 is a deficient number, since it is larger than the sum of its proper divisors (4474587441).

31322112031 is an equidigital number, since it uses as much as digits as its factorization.

31322112031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4474587440.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31322112031 its reverse (13021122313), we get a palindrome (44343234344).

The spelling of 31322112031 in words is "thirty-one billion, three hundred twenty-two million, one hundred twelve thousand, thirty-one".