218268025 has 12 divisors (see below), whose sum is σ = 270839932. Its totient is φ = 174493440.

The previous prime is 218268023. The next prime is 218268053. The reversal of 218268025 is 520862812.

It can be written as a sum of positive squares in 6 ways, for example, as 42758521 + 175509504 = 6539^2 + 13248^2 .

It is not a de Polignac number, because 218268025 - 2¹ = 218268023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218268023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57589 + ... + 61261.

Almost surely, 2^218268025 is an apocalyptic number.

218268025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

218268025 is a deficient number, since it is larger than the sum of its proper divisors (52571907).

218268025 is a wasteful number, since it uses less digits than its factorization.

218268025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060 (or 6055 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 218268025 is about 14773.8967439197. The cubic root of 218268025 is about 602.0927155647.

It can be divided in two parts, 2182 and 68025, that added together give a palindrome (70207).

The spelling of 218268025 in words is "two hundred eighteen million, two hundred sixty-eight thousand, twenty-five".