31222313231 has 8 divisors (see below), whose sum is σ = 31272587280. Its totient is φ = 31172081472.

The previous prime is 31222313207. The next prime is 31222313281. The reversal of 31222313231 is 13231322213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31222313231 - 2³⁴ = 14042444047 is a prime.

It is a super-2 number, since 2×31222313231² (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 = 31222313197 and 31222313206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222313281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1676336 + ... + 1694858.

It is an arithmetic number, because the mean of its divisors is an integer number (3909073410).

Almost surely, 2^31222313231 is an apocalyptic number.

31222313231 is a deficient number, since it is larger than the sum of its proper divisors (50274049).

31222313231 is a wasteful number, since it uses less digits than its factorization.

31222313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21145.

The product of its digits is 1296, while the sum is 23.

Adding to 31222313231 its reverse (13231322213), we get a palindrome (44453635444).

The spelling of 31222313231 in words is "thirty-one billion, two hundred twenty-two million, three hundred thirteen thousand, two hundred thirty-one".