31211242231 has 8 divisors (see below), whose sum is σ = 34085517984. Its totient is φ = 28404596640.

The previous prime is 31211242211. The next prime is 31211242241. The reversal of 31211242231 is 13224211213.

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 31211242231 - 2²⁵ = 31177687799 is a prime.

It is a super-2 number, since 2×31211242231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211242211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16906576 + ... + 16908421.

It is an arithmetic number, because the mean of its divisors is an integer number (4260689748).

Almost surely, 2^31211242231 is an apocalyptic number.

31211242231 is a deficient number, since it is larger than the sum of its proper divisors (2874275753).

31211242231 is a wasteful number, since it uses less digits than its factorization.

31211242231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33815081.

The product of its digits is 576, while the sum is 22.

Adding to 31211242231 its reverse (13224211213), we get a palindrome (44435453444).

The spelling of 31211242231 in words is "thirty-one billion, two hundred eleven million, two hundred forty-two thousand, two hundred thirty-one".