31313432233 has 16 divisors (see below), whose sum is σ = 32367170304. Its totient is φ = 30276979200.

The previous prime is 31313432203. The next prime is 31313432261. The reversal of 31313432233 is 33223431313.

It is a cyclic number.

It is not a de Polignac number, because 31313432233 - 2¹⁷ = 31313301161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313432203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2670283 + ... + 2681983.

It is an arithmetic number, because the mean of its divisors is an integer number (2022948144).

Almost surely, 2^31313432233 is an apocalyptic number.

It is an amenable number.

31313432233 is a deficient number, since it is larger than the sum of its proper divisors (1053738071).

31313432233 is a wasteful number, since it uses less digits than its factorization.

31313432233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12432.

The product of its digits is 11664, while the sum is 28.

Adding to 31313432233 its reverse (33223431313), we get a palindrome (64536863546).

The spelling of 31313432233 in words is "thirty-one billion, three hundred thirteen million, four hundred thirty-two thousand, two hundred thirty-three".