218136230 has 16 divisors (see below), whose sum is σ = 422848944. Its totient is φ = 80542560.

The previous prime is 218136229. The next prime is 218136257. The reversal of 218136230 is 32631812.

It is a super-2 number, since 2×218136230² = 95166829677225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 218136230.

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 7 ways as a sum of consecutive naturals, for example, 838856 + ... + 839115.

It is an arithmetic number, because the mean of its divisors is an integer number (26428059).

Almost surely, 2^218136230 is an apocalyptic number.

218136230 is a deficient number, since it is larger than the sum of its proper divisors (204712714).

218136230 is a wasteful number, since it uses less digits than its factorization.

218136230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677991.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 218136230 is about 14769.4356696524. The cubic root of 218136230 is about 601.9715055883.

The spelling of 218136230 in words is "two hundred eighteen million, one hundred thirty-six thousand, two hundred thirty".