31445125 has 8 divisors (see below), whose sum is σ = 39243672. Its totient is φ = 25156000.

The previous prime is 31445111. The next prime is 31445137. The reversal of 31445125 is 52154413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9326916 + 22118209 = 3054^2 + 4703^2 .

It is not a de Polignac number, because 31445125 - 2⁵ = 31445093 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 31445125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125656 + ... + 125905.

It is an arithmetic number, because the mean of its divisors is an integer number (4905459).

Almost surely, 2^31445125 is an apocalyptic number.

It is an amenable number.

31445125 is a deficient number, since it is larger than the sum of its proper divisors (7798547).

31445125 is an equidigital number, since it uses as much as digits as its factorization.

31445125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251576 (or 251566 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 31445125 is about 5607.5952956682. The cubic root of 31445125 is about 315.6344816287.

Adding to 31445125 its reverse (52154413), we get a palindrome (83599538).

The spelling of 31445125 in words is "thirty-one million, four hundred forty-five thousand, one hundred twenty-five".