31168243 has 16 divisors (see below), whose sum is σ = 34110720. Its totient is φ = 28387744.

The previous prime is 31168231. The next prime is 31168273. The reversal of 31168243 is 34286113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31168243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31168273) 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, 55080 + ... + 55642.

It is an arithmetic number, because the mean of its divisors is an integer number (2131920).

Almost surely, 2^31168243 is an apocalyptic number.

31168243 is a deficient number, since it is larger than the sum of its proper divisors (2942477).

31168243 is a wasteful number, since it uses less digits than its factorization.

31168243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698.

The product of its digits is 3456, while the sum is 28.

The square root of 31168243 is about 5582.8525862681. The cubic root of 31168243 is about 314.7053362706.

The spelling of 31168243 in words is "thirty-one million, one hundred sixty-eight thousand, two hundred forty-three".