31332031213 has 16 divisors (see below), whose sum is σ = 35981553280. Its totient is φ = 26726003136.

The previous prime is 31332031183. The next prime is 31332031223. The reversal of 31332031213 is 31213023313.

It is a de Polignac number, because none of the positive numbers 2^k-31332031213 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 (31332031223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5105695 + ... + 5111827.

It is an arithmetic number, because the mean of its divisors is an integer number (2248847080).

Almost surely, 2^31332031213 is an apocalyptic number.

It is an amenable number.

31332031213 is a deficient number, since it is larger than the sum of its proper divisors (4649522067).

31332031213 is a wasteful number, since it uses less digits than its factorization.

31332031213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9556.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31332031213 its reverse (31213023313), we get a palindrome (62545054526).

The spelling of 31332031213 in words is "thirty-one billion, three hundred thirty-two million, thirty-one thousand, two hundred thirteen".