31322212013 has 4 divisors (see below), whose sum is σ = 31325652960. Its totient is φ = 31318771068.

The previous prime is 31322212007. The next prime is 31322212039. The reversal of 31322212013 is 31021222313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31021222313 = 15391 ⋅2015543.

It is a cyclic number.

It is not a de Polignac number, because 31322212013 - 2⁴ = 31322211997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322212043) 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 3 ways as a sum of consecutive naturals, for example, 1706783 + ... + 1725036.

It is an arithmetic number, because the mean of its divisors is an integer number (7831413240).

Almost surely, 2^31322212013 is an apocalyptic number.

It is an amenable number.

31322212013 is a deficient number, since it is larger than the sum of its proper divisors (3440947).

31322212013 is an equidigital number, since it uses as much as digits as its factorization.

31322212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3440946.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31322212013 its reverse (31021222313), we get a palindrome (62343434326).

The spelling of 31322212013 in words is "thirty-one billion, three hundred twenty-two million, two hundred twelve thousand, thirteen".