218135325 has 12 divisors (see below), whose sum is σ = 360650528. Its totient is φ = 116338800.

The previous prime is 218135311. The next prime is 218135339. The reversal of 218135325 is 523531812.

It is an interprime number because it is at equal distance from previous prime (218135311) and next prime (218135339).

It is not a de Polignac number, because 218135325 - 2⁶ = 218135261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 218135292 and 218135301.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 1454161 + ... + 1454310.

Almost surely, 2^218135325 is an apocalyptic number.

218135325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

218135325 is a deficient number, since it is larger than the sum of its proper divisors (142515203).

218135325 is a wasteful number, since it uses less digits than its factorization.

218135325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908484 (or 2908479 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 218135325 is about 14769.4050320248. The cubic root of 218135325 is about 601.9706731040.

The spelling of 218135325 in words is "two hundred eighteen million, one hundred thirty-five thousand, three hundred twenty-five".