31424323231 has 12 divisors (see below), whose sum is σ = 38478764280. Its totient is φ = 25517494800.

The previous prime is 31424323223. The next prime is 31424323267. The reversal of 31424323231 is 13232342413.

It is a happy number.

It is not a de Polignac number, because 31424323231 - 2³ = 31424323223 is a prime.

It is a super-2 number, since 2×31424323231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31424323231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31424323031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16875720 + ... + 16877581.

It is an arithmetic number, because the mean of its divisors is an integer number (3206563690).

Almost surely, 2^31424323231 is an apocalyptic number.

31424323231 is a deficient number, since it is larger than the sum of its proper divisors (7054441049).

31424323231 is a wasteful number, since it uses less digits than its factorization.

31424323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33753334 (or 33753327 counting only the distinct ones).

The product of its digits is 10368, while the sum is 28.

Adding to 31424323231 its reverse (13232342413), we get a palindrome (44656665644).

The spelling of 31424323231 in words is "thirty-one billion, four hundred twenty-four million, three hundred twenty-three thousand, two hundred thirty-one".