31124523 has 6 divisors (see below), whose sum is σ = 41512252. Its totient is φ = 20743240.

The previous prime is 31124521. The next prime is 31124539. The reversal of 31124523 is 32542113.

It is not a de Polignac number, because 31124523 - 2¹ = 31124521 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 31124523.

It is not an unprimeable number, because it can be changed into a prime (31124521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8053 + ... + 11273.

Almost surely, 2^31124523 is an apocalyptic number.

31124523 is a deficient number, since it is larger than the sum of its proper divisors (10387729).

31124523 is an frugal number, since it uses more digits than its factorization.

31124523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6445 (or 3224 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 31124523 is about 5578.9356511794. The cubic root of 31124523 is about 314.5581206621.

Adding to 31124523 its reverse (32542113), we get a palindrome (63666636).

The spelling of 31124523 in words is "thirty-one million, one hundred twenty-four thousand, five hundred twenty-three".