31312116231 has 8 divisors (see below), whose sum is σ = 45544896384. Its totient is φ = 18977040120.

The previous prime is 31312116229. The next prime is 31312116239. The reversal of 31312116231 is 13261121313.

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

It is not a de Polignac number, because 31312116231 - 2¹ = 31312116229 is a prime.

It is a super-2 number, since 2×31312116231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312116239) 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, 474425971 + ... + 474426036.

It is an arithmetic number, because the mean of its divisors is an integer number (5693112048).

Almost surely, 2^31312116231 is an apocalyptic number.

31312116231 is a deficient number, since it is larger than the sum of its proper divisors (14232780153).

31312116231 is a wasteful number, since it uses less digits than its factorization.

31312116231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948852021.

The product of its digits is 648, while the sum is 24.

Adding to 31312116231 its reverse (13261121313), we get a palindrome (44573237544).

The spelling of 31312116231 in words is "thirty-one billion, three hundred twelve million, one hundred sixteen thousand, two hundred thirty-one".