31213223313 has 16 divisors (see below), whose sum is σ = 43881216000. Its totient is φ = 19680682320.

The previous prime is 31213223299. The next prime is 31213223357. The reversal of 31213223313 is 31332231213.

It is not a de Polignac number, because 31213223313 - 2⁵ = 31213223281 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31213223513) 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, 422953 + ... + 491238.

It is an arithmetic number, because the mean of its divisors is an integer number (2742576000).

Almost surely, 2^31213223313 is an apocalyptic number.

It is an amenable number.

31213223313 is a deficient number, since it is larger than the sum of its proper divisors (12667992687).

31213223313 is a wasteful number, since it uses less digits than its factorization.

31213223313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914812.

The product of its digits is 1944, while the sum is 24.

Adding to 31213223313 its reverse (31332231213), we get a palindrome (62545454526).

The spelling of 31213223313 in words is "thirty-one billion, two hundred thirteen million, two hundred twenty-three thousand, three hundred thirteen".