31232013231 has 8 divisors (see below), whose sum is σ = 41643754624. Its totient is φ = 20820807000.

The previous prime is 31232013221. The next prime is 31232013271. The reversal of 31232013231 is 13231023213.

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

It is not a de Polignac number, because 31232013231 - 2⁶ = 31232013167 is a prime.

It is a super-2 number, since 2×31232013231² (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 = 31232013198 and 31232013207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31232013221) 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, 31590 + ... + 251916.

It is an arithmetic number, because the mean of its divisors is an integer number (5205469328).

Almost surely, 2^31232013231 is an apocalyptic number.

31232013231 is a deficient number, since it is larger than the sum of its proper divisors (10411741393).

31232013231 is a wasteful number, since it uses less digits than its factorization.

31232013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267581.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31232013231 its reverse (13231023213), we get a palindrome (44463036444).

The spelling of 31232013231 in words is "thirty-one billion, two hundred thirty-two million, thirteen thousand, two hundred thirty-one".