218790025 has 12 divisors (see below), whose sum is σ = 273936832. Its totient is φ = 173330640.

The previous prime is 218790001. The next prime is 218790059. The reversal of 218790025 is 520097812.

It is not a de Polignac number, because 218790025 - 2⁵ = 218789993 is a prime.

It is a Duffinian number.

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, 39909 + ... + 45058.

Almost surely, 2^218790025 is an apocalyptic number.

218790025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

218790025 is a deficient number, since it is larger than the sum of its proper divisors (55146807).

218790025 is a wasteful number, since it uses less digits than its factorization.

218790025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85080 (or 85075 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 218790025 is about 14791.5524878222. The cubic root of 218790025 is about 602.5723127338.

The spelling of 218790025 in words is "two hundred eighteen million, seven hundred ninety thousand, twenty-five".