31213212233 has 8 divisors (see below), whose sum is σ = 35899455552. Its totient is φ = 26583772176.

The previous prime is 31213212229. The next prime is 31213212259. The reversal of 31213212233 is 33221231213.

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 31213212233 - 2² = 31213212229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31213212199 and 31213212208.

It is not an unprimeable number, because it can be changed into a prime (31213212223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14199635 + ... + 14201832.

It is an arithmetic number, because the mean of its divisors is an integer number (4487431944).

Almost surely, 2^31213212233 is an apocalyptic number.

It is an amenable number.

31213212233 is a deficient number, since it is larger than the sum of its proper divisors (4686243319).

31213212233 is a wasteful number, since it uses less digits than its factorization.

31213212233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28401631.

The product of its digits is 1296, while the sum is 23.

Adding to 31213212233 its reverse (33221231213), we get a palindrome (64434443446).

The spelling of 31213212233 in words is "thirty-one billion, two hundred thirteen million, two hundred twelve thousand, two hundred thirty-three".