31080225 has 48 divisors (see below), whose sum is σ = 56764224. Its totient is φ = 14880000.

The previous prime is 31080223. The next prime is 31080239. The reversal of 31080225 is 52208013.

It is not a de Polignac number, because 31080225 - 2¹ = 31080223 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31080223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83139 + ... + 83511.

It is an arithmetic number, because the mean of its divisors is an integer number (1182588).

Almost surely, 2^31080225 is an apocalyptic number.

It is an amenable number.

31080225 is a deficient number, since it is larger than the sum of its proper divisors (25683999).

31080225 is a wasteful number, since it uses less digits than its factorization.

31080225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 31080225 is about 5574.9641254451. The cubic root of 31080225 is about 314.4088181167.

Adding to 31080225 its reverse (52208013), we get a palindrome (83288238).

The spelling of 31080225 in words is "thirty-one million, eighty thousand, two hundred twenty-five".