31022243231 has 16 divisors (see below), whose sum is σ = 36302323200. Its totient is φ = 25955058528.

The previous prime is 31022243221. The next prime is 31022243237. The reversal of 31022243231 is 13234222013.

It is a de Polignac number, because none of the positive numbers 2^k-31022243231 is a prime.

It is a super-2 number, since 2×31022243231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31022243197 and 31022243206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31022243237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436205 + ... + 502313.

It is an arithmetic number, because the mean of its divisors is an integer number (2268895200).

Almost surely, 2^31022243231 is an apocalyptic number.

31022243231 is a deficient number, since it is larger than the sum of its proper divisors (5280079969).

31022243231 is a wasteful number, since it uses less digits than its factorization.

31022243231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67718.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31022243231 its reverse (13234222013), we get a palindrome (44256465244).

The spelling of 31022243231 in words is "thirty-one billion, twenty-two million, two hundred forty-three thousand, two hundred thirty-one".