31214243 has 16 divisors (see below), whose sum is σ = 33868800. Its totient is φ = 28691520.

The previous prime is 31214233. The next prime is 31214263. The reversal of 31214243 is 34241213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31214243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31214213) 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, 74288 + ... + 74706.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

Almost surely, 2^31214243 is an apocalyptic number.

31214243 is a deficient number, since it is larger than the sum of its proper divisors (2654557).

31214243 is a wasteful number, since it uses less digits than its factorization.

31214243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562.

The product of its digits is 576, while the sum is 20.

The square root of 31214243 is about 5586.9708250536. The cubic root of 31214243 is about 314.8600806318.

Adding to 31214243 its reverse (34241213), we get a palindrome (65455456).

The spelling of 31214243 in words is "thirty-one million, two hundred fourteen thousand, two hundred forty-three".