218368425 has 48 divisors (see below), whose sum is σ = 414616320. Its totient is φ = 100296000.

The previous prime is 218368421. The next prime is 218368453. The reversal of 218368425 is 524863812.

It is not a de Polignac number, because 218368425 - 2² = 218368421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218368421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8710 + ... + 22640.

It is an arithmetic number, because the mean of its divisors is an integer number (8637840).

Almost surely, 2^218368425 is an apocalyptic number.

218368425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

218368425 is a deficient number, since it is larger than the sum of its proper divisors (196247895).

218368425 is a wasteful number, since it uses less digits than its factorization.

218368425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13974 (or 13969 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 218368425 is about 14777.2942381209. The cubic root of 218368425 is about 602.1850192699.

The spelling of 218368425 in words is "two hundred eighteen million, three hundred sixty-eight thousand, four hundred twenty-five".