31544233212 has 24 divisors (see below), whose sum is σ = 73606306816. Its totient is φ = 10514302128.

The previous prime is 31544233151. The next prime is 31544233213. The reversal of 31544233212 is 21233244513.

It is a self number, because there is not a number n which added to its sum of digits gives 31544233212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31544233213) 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, 377253 + ... + 453219.

Almost surely, 2^31544233212 is an apocalyptic number.

It is an amenable number.

31544233212 is an abundant number, since it is smaller than the sum of its proper divisors (42062073604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31544233212 is a wasteful number, since it uses less digits than its factorization.

31544233212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110577 (or 110575 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

Adding to 31544233212 its reverse (21233244513), we get a palindrome (52777477725).

The spelling of 31544233212 in words is "thirty-one billion, five hundred forty-four million, two hundred thirty-three thousand, two hundred twelve".