31323125 has 20 divisors (see below), whose sum is σ = 40861920. Its totient is φ = 23958000.

The previous prime is 31323107. The next prime is 31323133. The reversal of 31323125 is 52132313.

It is not a de Polignac number, because 31323125 - 2⁸ = 31322869 is a prime.

It is a super-2 number, since 2×31323125² = 1962276319531250, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31323097 and 31323106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13286 + ... + 15464.

It is an arithmetic number, because the mean of its divisors is an integer number (2043096).

Almost surely, 2^31323125 is an apocalyptic number.

It is an amenable number.

31323125 is a deficient number, since it is larger than the sum of its proper divisors (9538795).

31323125 is an equidigital number, since it uses as much as digits as its factorization.

31323125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222 (or 2207 counting only the distinct ones).

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

The square root of 31323125 is about 5596.7066208620. The cubic root of 31323125 is about 315.2257556932.

Adding to 31323125 its reverse (52132313), we get a palindrome (83455438).

The spelling of 31323125 in words is "thirty-one million, three hundred twenty-three thousand, one hundred twenty-five".