31030225 has 12 divisors (see below), whose sum is σ = 39719680. Its totient is φ = 24022800.

The previous prime is 31030213. The next prime is 31030267. The reversal of 31030225 is 52203013.

It is not a de Polignac number, because 31030225 - 2⁵ = 31030193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31030199 and 31030208.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19245 + ... + 20794.

Almost surely, 2^31030225 is an apocalyptic number.

It is an amenable number.

31030225 is a deficient number, since it is larger than the sum of its proper divisors (8689455).

31030225 is a wasteful number, since it uses less digits than its factorization.

31030225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40080 (or 40075 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 31030225 is about 5570.4779866722. The cubic root of 31030225 is about 314.2401269475.

Adding to 31030225 its reverse (52203013), we get a palindrome (83233238).

The spelling of 31030225 in words is "thirty-one million, thirty thousand, two hundred twenty-five".