31214985 has 16 divisors (see below), whose sum is σ = 51555840. Its totient is φ = 16110720.

The previous prime is 31214983. The next prime is 31214999. The reversal of 31214985 is 58941213.

It is not a de Polignac number, because 31214985 - 2¹ = 31214983 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31214983) 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 15 ways as a sum of consecutive naturals, for example, 33100 + ... + 34029.

It is an arithmetic number, because the mean of its divisors is an integer number (3222240).

Almost surely, 2^31214985 is an apocalyptic number.

It is an amenable number.

31214985 is a deficient number, since it is larger than the sum of its proper divisors (20340855).

31214985 is a wasteful number, since it uses less digits than its factorization.

31214985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67168.

The product of its digits is 8640, while the sum is 33.

The square root of 31214985 is about 5587.0372291582. The cubic root of 31214985 is about 314.8625754793.

The spelling of 31214985 in words is "thirty-one million, two hundred fourteen thousand, nine hundred eighty-five".