31113231232231 has 8 divisors (see below), whose sum is σ = 31251521473920. Its totient is φ = 30974951758968.

The previous prime is 31113231232217. The next prime is 31113231232249. The reversal of 31113231232231 is 13223213231113.

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 31113231232231 - 2¹³ = 31113231224039 is a prime.

It is a super-2 number, since 2×31113231232231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31113231232231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113231232261) 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, 3127230 + ... + 8485636.

It is an arithmetic number, because the mean of its divisors is an integer number (3906440184240).

Almost surely, 2^{31113231232231} is an apocalyptic number.

31113231232231 is a deficient number, since it is larger than the sum of its proper divisors (138290241689).

31113231232231 is a wasteful number, since it uses less digits than its factorization.

31113231232231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5384213.

The product of its digits is 3888, while the sum is 28.

Adding to 31113231232231 its reverse (13223213231113), we get a palindrome (44336444463344).

The spelling of 31113231232231 in words is "thirty-one trillion, one hundred thirteen billion, two hundred thirty-one million, two hundred thirty-two thousand, two hundred thirty-one".