31202320322213 has 8 divisors (see below), whose sum is σ = 33038467901208. Its totient is φ = 29366252406784.

The previous prime is 31202320322197. The next prime is 31202320322237. The reversal of 31202320322213 is 31222302320213.

It can be written as a sum of positive squares in 4 ways, for example, as 2202781367329 + 28999538954884 = 1484177^2 + 5385122^2 .

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 31202320322213 - 2⁴ = 31202320322197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31202320322113) 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, 19108556 + ... + 20677077.

It is an arithmetic number, because the mean of its divisors is an integer number (4129808487651).

Almost surely, 2^{31202320322213} is an apocalyptic number.

It is an amenable number.

31202320322213 is a deficient number, since it is larger than the sum of its proper divisors (1836147578995).

31202320322213 is a wasteful number, since it uses less digits than its factorization.

31202320322213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39831783.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 31202320322213 its reverse (31222302320213), we get a palindrome (62424622642426).

The spelling of 31202320322213 in words is "thirty-one trillion, two hundred two billion, three hundred twenty million, three hundred twenty-two thousand, two hundred thirteen".