31311012044231 has 8 divisors (see below), whose sum is σ = 32941578922224. Its totient is φ = 29721725340480.

The previous prime is 31311012044189. The next prime is 31311012044267. The reversal of 31311012044231 is 13244021011313.

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 31311012044231 - 2¹⁴ = 31311012027847 is a prime.

It is a super-2 number, since 2×31311012044231² (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 31311012044231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311012043231) 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, 10320042005 + ... + 10320045038.

It is an arithmetic number, because the mean of its divisors is an integer number (4117697365278).

Almost surely, 2^{31311012044231} is an apocalyptic number.

31311012044231 is a deficient number, since it is larger than the sum of its proper divisors (1630566877993).

31311012044231 is a wasteful number, since it uses less digits than its factorization.

31311012044231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20640087121.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 31311012044231 its reverse (13244021011313), we get a palindrome (44555033055544).

The spelling of 31311012044231 in words is "thirty-one trillion, three hundred eleven billion, twelve million, forty-four thousand, two hundred thirty-one".