31232323403221 has 4 divisors (see below), whose sum is σ = 31251831414444. Its totient is φ = 31212815392000.

The previous prime is 31232323403161. The next prime is 31232323403227. The reversal of 31232323403221 is 12230432323213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25822912640625 + 5409410762596 = 5081625^2 + 2325814^2 .

It is a cyclic number.

It is not a de Polignac number, because 31232323403221 - 2²³ = 31232315014613 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 (31232323403227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9754003210 + ... + 9754006411.

It is an arithmetic number, because the mean of its divisors is an integer number (7812957853611).

Almost surely, 2^{31232323403221} is an apocalyptic number.

It is an amenable number.

31232323403221 is a deficient number, since it is larger than the sum of its proper divisors (19508011223).

31232323403221 is a wasteful number, since it uses less digits than its factorization.

31232323403221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19508011222.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 31232323403221 its reverse (12230432323213), we get a palindrome (43462755726434).

The spelling of 31232323403221 in words is "thirty-one trillion, two hundred thirty-two billion, three hundred twenty-three million, four hundred three thousand, two hundred twenty-one".