31321223002013 has 8 divisors (see below), whose sum is σ = 36950382896640. Its totient is φ = 25980737973840.

The previous prime is 31321223001997. The next prime is 31321223002019. The reversal of 31321223002013 is 31020032212313.

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 31321223002013 - 2⁴ = 31321223001997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31321223002013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321223002019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72168716378 + ... + 72168716811.

It is an arithmetic number, because the mean of its divisors is an integer number (4618797862080).

Almost surely, 2^{31321223002013} is an apocalyptic number.

It is an amenable number.

31321223002013 is a deficient number, since it is larger than the sum of its proper divisors (5629159894627).

31321223002013 is a wasteful number, since it uses less digits than its factorization.

31321223002013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144337433227.

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

Adding to 31321223002013 its reverse (31020032212313), we get a palindrome (62341255214326).

The spelling of 31321223002013 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twenty-three million, two thousand, thirteen".