31442613 has 16 divisors (see below), whose sum is σ = 43388352. Its totient is φ = 20240000.

The previous prime is 31442591. The next prime is 31442617. The reversal of 31442613 is 31624413.

It is a cyclic number.

It is not a de Polignac number, because 31442613 - 2⁹ = 31442101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11158 + ... + 13688.

It is an arithmetic number, because the mean of its divisors is an integer number (2711772).

Almost surely, 2^31442613 is an apocalyptic number.

It is an amenable number.

31442613 is a deficient number, since it is larger than the sum of its proper divisors (11945739).

31442613 is a wasteful number, since it uses less digits than its factorization.

31442613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676.

The product of its digits is 1728, while the sum is 24.

The square root of 31442613 is about 5607.3713092678. The cubic root of 31442613 is about 315.6260765640.

The spelling of 31442613 in words is "thirty-one million, four hundred forty-two thousand, six hundred thirteen".