31253123 has 16 divisors (see below), whose sum is σ = 37083744. Its totient is φ = 26012160.

The previous prime is 31253083. The next prime is 31253141. The reversal of 31253123 is 32135213.

It is a cyclic number.

It is not a de Polignac number, because 31253123 - 2⁶ = 31253059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31253095 and 31253104.

It is not an unprimeable number, because it can be changed into a prime (31253143) 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, 4661 + ... + 9177.

It is an arithmetic number, because the mean of its divisors is an integer number (2317734).

Almost surely, 2^31253123 is an apocalyptic number.

31253123 is a deficient number, since it is larger than the sum of its proper divisors (5830621).

31253123 is a wasteful number, since it uses less digits than its factorization.

31253123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4582.

The product of its digits is 540, while the sum is 20.

The square root of 31253123 is about 5590.4492663828. The cubic root of 31253123 is about 314.9907547467.

Adding to 31253123 its reverse (32135213), we get a palindrome (63388336).

It can be divided in two parts, 312 and 53123, that added together give a palindrome (53435).

The spelling of 31253123 in words is "thirty-one million, two hundred fifty-three thousand, one hundred twenty-three".