215625025 has 72 divisors (see below), whose sum is σ = 356227200. Its totient is φ = 126297600.

The previous prime is 215625019. The next prime is 215625029. The reversal of 215625025 is 520526512.

It is not a de Polignac number, because 215625025 - 2⁵ = 215624993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215624984 and 215625002.

It is not an unprimeable number, because it can be changed into a prime (215625029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 359676 + ... + 360274.

It is an arithmetic number, because the mean of its divisors is an integer number (4947600).

Almost surely, 2^215625025 is an apocalyptic number.

215625025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215625025 is a deficient number, since it is larger than the sum of its proper divisors (140602175).

215625025 is a wasteful number, since it uses less digits than its factorization.

215625025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 215625025 is about 14684.1760068449. The cubic root of 215625025 is about 599.6525998199.

The spelling of 215625025 in words is "two hundred fifteen million, six hundred twenty-five thousand, twenty-five".