30715225 has 12 divisors (see below), whose sum is σ = 38257596. Its totient is φ = 24462080.

The previous prime is 30715213. The next prime is 30715253. The reversal of 30715225 is 52251703.

It can be written as a sum of positive squares in 6 ways, for example, as 2752281 + 27962944 = 1659^2 + 5288^2 .

It is not a de Polignac number, because 30715225 - 2²³ = 22326617 is a prime.

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 30715225.

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, 3189 + ... + 8461.

It is an arithmetic number, because the mean of its divisors is an integer number (3188133).

Almost surely, 2^30715225 is an apocalyptic number.

It is an amenable number.

30715225 is a deficient number, since it is larger than the sum of its proper divisors (7542371).

30715225 is a wasteful number, since it uses less digits than its factorization.

30715225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5516 (or 5511 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 30715225 is about 5542.1318100529. The cubic root of 30715225 is about 313.1731834622.

Adding to 30715225 its reverse (52251703), we get a palindrome (82966928).

The spelling of 30715225 in words is "thirty million, seven hundred fifteen thousand, two hundred twenty-five".