31475613 has 24 divisors (see below), whose sum is σ = 46586848. Its totient is φ = 18781056.

The previous prime is 31475611. The next prime is 31475623. The reversal of 31475613 is 31657413.

It is not a de Polignac number, because 31475613 - 2¹ = 31475611 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 (31475611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229681 + ... + 229817.

Almost surely, 2^31475613 is an apocalyptic number.

It is an amenable number.

31475613 is a deficient number, since it is larger than the sum of its proper divisors (15111235).

31475613 is a wasteful number, since it uses less digits than its factorization.

31475613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 196 counting only the distinct ones).

The product of its digits is 7560, while the sum is 30.

The square root of 31475613 is about 5610.3130928675. The cubic root of 31475613 is about 315.7364577506.

The spelling of 31475613 in words is "thirty-one million, four hundred seventy-five thousand, six hundred thirteen".