218134425 has 24 divisors (see below), whose sum is σ = 370400896. Its totient is φ = 113192640.

The previous prime is 218134417. The next prime is 218134471. The reversal of 218134425 is 524431812.

It is not a de Polignac number, because 218134425 - 2³ = 218134417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 218134392 and 218134401.

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 23 ways as a sum of consecutive naturals, for example, 36529 + ... + 42078.

Almost surely, 2^218134425 is an apocalyptic number.

218134425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

218134425 is a deficient number, since it is larger than the sum of its proper divisors (152266471).

218134425 is a wasteful number, since it uses less digits than its factorization.

218134425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78657 (or 78652 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 218134425 is about 14769.3745636029. The cubic root of 218134425 is about 601.9698452168.

The spelling of 218134425 in words is "two hundred eighteen million, one hundred thirty-four thousand, four hundred twenty-five".