31312133213 has 8 divisors (see below), whose sum is σ = 33463876032. Its totient is φ = 29194818496.

The previous prime is 31312133183. The next prime is 31312133219. The reversal of 31312133213 is 31233121313.

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 31312133213 - 2¹⁸ = 31311871069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312133219) 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, 8605145 + ... + 8608782.

It is an arithmetic number, because the mean of its divisors is an integer number (4182984504).

Almost surely, 2^31312133213 is an apocalyptic number.

It is an amenable number.

31312133213 is a deficient number, since it is larger than the sum of its proper divisors (2151742819).

31312133213 is a wasteful number, since it uses less digits than its factorization.

31312133213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17214051.

The product of its digits is 972, while the sum is 23.

Adding to 31312133213 its reverse (31233121313), we get a palindrome (62545254526).

The spelling of 31312133213 in words is "thirty-one billion, three hundred twelve million, one hundred thirty-three thousand, two hundred thirteen".