31312243321 has 8 divisors (see below), whose sum is σ = 32169957120. Its totient is φ = 30462508608.

The previous prime is 31312243307. The next prime is 31312243327. The reversal of 31312243321 is 12334221313.

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 31312243321 - 2³³ = 22722308729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31312243327) 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, 1986816 + ... + 2002513.

It is an arithmetic number, because the mean of its divisors is an integer number (4021244640).

Almost surely, 2^31312243321 is an apocalyptic number.

It is an amenable number.

31312243321 is a deficient number, since it is larger than the sum of its proper divisors (857713799).

31312243321 is a wasteful number, since it uses less digits than its factorization.

31312243321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989543.

The product of its digits is 2592, while the sum is 25.

Adding to 31312243321 its reverse (12334221313), we get a palindrome (43646464634).

The spelling of 31312243321 in words is "thirty-one billion, three hundred twelve million, two hundred forty-three thousand, three hundred twenty-one".