31332344213 has 4 divisors (see below), whose sum is σ = 31332855180. Its totient is φ = 31331833248.

The previous prime is 31332344177. The next prime is 31332344257. The reversal of 31332344213 is 31244323313.

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 17598144964 + 13734199249 = 132658^2 + 117193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31332344213 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 (31332344293) 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, 148598 + ... + 291111.

It is an arithmetic number, because the mean of its divisors is an integer number (7833213795).

Almost surely, 2^31332344213 is an apocalyptic number.

It is an amenable number.

31332344213 is a deficient number, since it is larger than the sum of its proper divisors (510967).

31332344213 is an equidigital number, since it uses as much as digits as its factorization.

31332344213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510966.

The product of its digits is 15552, while the sum is 29.

Adding to 31332344213 its reverse (31244323313), we get a palindrome (62576667526).

The spelling of 31332344213 in words is "thirty-one billion, three hundred thirty-two million, three hundred forty-four thousand, two hundred thirteen".