31324123 has 4 divisors (see below), whose sum is σ = 32088168. Its totient is φ = 30560080.

The previous prime is 31324109. The next prime is 31324127. The reversal of 31324123 is 32142313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31324123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31324123.

It is not an unprimeable number, because it can be changed into a prime (31324127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381961 + ... + 382042.

It is an arithmetic number, because the mean of its divisors is an integer number (8022042).

Almost surely, 2^31324123 is an apocalyptic number.

31324123 is a deficient number, since it is larger than the sum of its proper divisors (764045).

31324123 is an equidigital number, since it uses as much as digits as its factorization.

31324123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764044.

The product of its digits is 432, while the sum is 19.

The square root of 31324123 is about 5596.7957797297. The cubic root of 31324123 is about 315.2291035069.

Adding to 31324123 its reverse (32142313), we get a palindrome (63466436).

The spelling of 31324123 in words is "thirty-one million, three hundred twenty-four thousand, one hundred twenty-three".