31023125 has 30 divisors (see below), whose sum is σ = 45140238. Its totient is φ = 21252000.

The previous prime is 31023107. The next prime is 31023137. The reversal of 31023125 is 52132013.

It can be written as a sum of positive squares in 5 ways, for example, as 23261329 + 7761796 = 4823^2 + 2786^2 .

It is not a de Polignac number, because 31023125 - 2⁶ = 31023061 is a prime.

It is a hoax number, since the sum of its digits (17) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 30119 + ... + 31131.

Almost surely, 2^31023125 is an apocalyptic number.

31023125 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31023125 is a deficient number, since it is larger than the sum of its proper divisors (14117113).

31023125 is an equidigital number, since it uses as much as digits as its factorization.

31023125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047 (or 1025 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 31023125 is about 5569.8406619938. The cubic root of 31023125 is about 314.2161581118.

Adding to 31023125 its reverse (52132013), we get a palindrome (83155138).

The spelling of 31023125 in words is "thirty-one million, twenty-three thousand, one hundred twenty-five".