31966413 has 4 divisors (see below), whose sum is σ = 42621888. Its totient is φ = 21310940.

The previous prime is 31966411. The next prime is 31966423. The reversal of 31966413 is 31466913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31966413 - 2¹ = 31966411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31966411) 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, 5327733 + ... + 5327738.

It is an arithmetic number, because the mean of its divisors is an integer number (10655472).

Almost surely, 2^31966413 is an apocalyptic number.

It is an amenable number.

31966413 is a deficient number, since it is larger than the sum of its proper divisors (10655475).

31966413 is a wasteful number, since it uses less digits than its factorization.

31966413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10655474.

The product of its digits is 11664, while the sum is 33.

The square root of 31966413 is about 5653.8847706687. The cubic root of 31966413 is about 317.3690964282.

Subtracting from 31966413 its reverse (31466913), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 31966413 in words is "thirty-one million, nine hundred sixty-six thousand, four hundred thirteen".