218892025 has 27 divisors (see below), whose sum is σ = 299457613. Its totient is φ = 158602400.

The previous prime is 218892001. The next prime is 218892041. The reversal of 218892025 is 520298812.

The square root of 218892025 is 14795.

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

It can be written as a sum of positive squares in 4 ways, for example, as 83960569 + 134931456 = 9163^2 + 11616^2 .

It is a de Polignac number, because none of the positive numbers 2^k-218892025 is a prime.

It is a Duffinian number.

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 26 ways as a sum of consecutive naturals, for example, 813591 + ... + 813859.

Almost surely, 2^218892025 is an apocalyptic number.

218892025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

218892025 is the 14795-th square number.

218892025 is the 7398-th centered octagonal number.

It is an amenable number.

218892025 is a deficient number, since it is larger than the sum of its proper divisors (80565588).

218892025 is an equidigital number, since it uses as much as digits as its factorization.

218892025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The cubic root of 218892025 is about 602.6659380063.

The spelling of 218892025 in words is "two hundred eighteen million, eight hundred ninety-two thousand, twenty-five".