39231213 has 24 divisors (see below), whose sum is σ = 62818560. Its totient is φ = 21692160.

The previous prime is 39231197. The next prime is 39231217. The reversal of 39231213 is 31213293.

It is not a de Polignac number, because 39231213 - 2⁴ = 39231197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39231217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253 + ... + 8861.

It is an arithmetic number, because the mean of its divisors is an integer number (2617440).

Almost surely, 2^39231213 is an apocalyptic number.

It is an amenable number.

39231213 is a deficient number, since it is larger than the sum of its proper divisors (23587347).

39231213 is a wasteful number, since it uses less digits than its factorization.

39231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8657 (or 8650 counting only the distinct ones).

The product of its digits is 972, while the sum is 24.

The square root of 39231213 is about 6263.4824977803. The cubic root of 39231213 is about 339.7899885304.

The spelling of 39231213 in words is "thirty-nine million, two hundred thirty-one thousand, two hundred thirteen".