31325123 has 4 divisors (see below), whose sum is σ = 31381920. Its totient is φ = 31268328.

The previous prime is 31325117. The next prime is 31325131. The reversal of 31325123 is 32152313.

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 31325123 - 2¹⁰ = 31324099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31325095 and 31325104.

It is not an unprimeable number, because it can be changed into a prime (31325143) 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, 27563 + ... + 28676.

It is an arithmetic number, because the mean of its divisors is an integer number (7845480).

Almost surely, 2^31325123 is an apocalyptic number.

31325123 is a deficient number, since it is larger than the sum of its proper divisors (56797).

31325123 is an equidigital number, since it uses as much as digits as its factorization.

31325123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56796.

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

The square root of 31325123 is about 5596.8851158479. The cubic root of 31325123 is about 315.2324579584.

Adding to 31325123 its reverse (32152313), we get a palindrome (63477436).

The spelling of 31325123 in words is "thirty-one million, three hundred twenty-five thousand, one hundred twenty-three".