31001233412 has 6 divisors (see below), whose sum is σ = 54252158478. Its totient is φ = 15500616704.

The previous prime is 31001233411. The next prime is 31001233433. The reversal of 31001233412 is 21433210013.

It can be written as a sum of positive squares in only one way, i.e., 17597614336 + 13403619076 = 132656^2 + 115774^2 .

It is a super-2 number, since 2×31001233412² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31001233411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3875154173 + ... + 3875154180.

It is an arithmetic number, because the mean of its divisors is an integer number (9042026413).

Almost surely, 2^31001233412 is an apocalyptic number.

It is an amenable number.

31001233412 is a deficient number, since it is larger than the sum of its proper divisors (23250925066).

31001233412 is a wasteful number, since it uses less digits than its factorization.

31001233412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7750308357 (or 7750308355 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31001233412 its reverse (21433210013), we get a palindrome (52434443425).

The spelling of 31001233412 in words is "thirty-one billion, one million, two hundred thirty-three thousand, four hundred twelve".