215205025 has 12 divisors (see below), whose sum is σ = 304976512. Its totient is φ = 147569040.

The previous prime is 215205013. The next prime is 215205041. The reversal of 215205025 is 520502512.

It is not a de Polignac number, because 215205025 - 2⁵ = 215204993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215204987 and 215205005.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 614697 + ... + 615046.

Almost surely, 2^215205025 is an apocalyptic number.

215205025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215205025 is a deficient number, since it is larger than the sum of its proper divisors (89771487).

215205025 is a wasteful number, since it uses less digits than its factorization.

215205025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229760 (or 1229755 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 215205025 is about 14669.8679271492. The cubic root of 215205025 is about 599.2630071436.

Adding to 215205025 its reverse (520502512), we get a palindrome (735707537).

The spelling of 215205025 in words is "two hundred fifteen million, two hundred five thousand, twenty-five".