31319001 has 16 divisors (see below), whose sum is σ = 53027200. Its totient is φ = 17896464.

The previous prime is 31318999. The next prime is 31319017. The reversal of 31319001 is 10091313.

It is not a de Polignac number, because 31319001 - 2¹ = 31318999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31319051) 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, 82666 + ... + 83043.

It is an arithmetic number, because the mean of its divisors is an integer number (3314200).

Almost surely, 2^31319001 is an apocalyptic number.

It is an amenable number.

31319001 is a deficient number, since it is larger than the sum of its proper divisors (21708199).

31319001 is a wasteful number, since it uses less digits than its factorization.

31319001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165725 (or 165719 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

The square root of 31319001 is about 5596.3381777730. The cubic root of 31319001 is about 315.2119208872.

The spelling of 31319001 in words is "thirty-one million, three hundred nineteen thousand, one".