31131233441 has 48 divisors (see below), whose sum is σ = 39550156800. Its totient is φ = 23985007200.

The previous prime is 31131233417. The next prime is 31131233453. The reversal of 31131233441 is 14433213113.

It is not a de Polignac number, because 31131233441 - 2⁶ = 31131233377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31131233441.

It is not an unprimeable number, because it can be changed into a prime (31131233491) 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 47 ways as a sum of consecutive naturals, for example, 32193140 + ... + 32194106.

It is an arithmetic number, because the mean of its divisors is an integer number (823961600).

Almost surely, 2^31131233441 is an apocalyptic number.

It is an amenable number.

31131233441 is a deficient number, since it is larger than the sum of its proper divisors (8418923359).

31131233441 is a wasteful number, since it uses less digits than its factorization.

31131233441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386 (or 1375 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

Adding to 31131233441 its reverse (14433213113), we get a palindrome (45564446554).

The spelling of 31131233441 in words is "thirty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, four hundred forty-one".