30415225 has 9 divisors (see below), whose sum is σ = 37749103. Its totient is φ = 24310120.

The previous prime is 30415213. The next prime is 30415283. The reversal of 30415225 is 52251403.

The square root of 30415225 is 5515.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10949481 + 19465744 = 3309^2 + 4412^2 .

It is a de Polignac number, because none of the positive numbers 2^k-30415225 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30415196 and 30415205.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27024 + ... + 28126.

Almost surely, 2^30415225 is an apocalyptic number.

30415225 is the 5515-th square number.

30415225 is the 2758-th centered octagonal number.

It is an amenable number.

30415225 is a deficient number, since it is larger than the sum of its proper divisors (7333878).

30415225 is an frugal number, since it uses more digits than its factorization.

30415225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The cubic root of 30415225 is about 312.1502433576.

Adding to 30415225 its reverse (52251403), we get a palindrome (82666628).

The spelling of 30415225 in words is "thirty million, four hundred fifteen thousand, two hundred twenty-five".