31112043 has 4 divisors (see below), whose sum is σ = 41482728. Its totient is φ = 20741360.

The previous prime is 31112033. The next prime is 31112051. The reversal of 31112043 is 34021113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31112043 - 2⁴ = 31112027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31112033) 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 3 ways as a sum of consecutive naturals, for example, 5185338 + ... + 5185343.

It is an arithmetic number, because the mean of its divisors is an integer number (10370682).

Almost surely, 2^31112043 is an apocalyptic number.

31112043 is a deficient number, since it is larger than the sum of its proper divisors (10370685).

31112043 is a wasteful number, since it uses less digits than its factorization.

31112043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10370684.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31112043 is about 5577.8170461212. The cubic root of 31112043 is about 314.5160722516.

Adding to 31112043 its reverse (34021113), we get a palindrome (65133156).

The spelling of 31112043 in words is "thirty-one million, one hundred twelve thousand, forty-three".