218198630 has 32 divisors (see below), whose sum is σ = 427744800. Its totient is φ = 79656192.

The previous prime is 218198627. The next prime is 218198633. The reversal of 218198630 is 36891812.

It is an interprime number because it is at equal distance from previous prime (218198627) and next prime (218198633).

It is a super-2 number, since 2×218198630² = 95221284267753800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218198633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2141 + ... + 20999.

It is an arithmetic number, because the mean of its divisors is an integer number (13367025).

Almost surely, 2^218198630 is an apocalyptic number.

218198630 is a deficient number, since it is larger than the sum of its proper divisors (209546170).

218198630 is a wasteful number, since it uses less digits than its factorization.

218198630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18968.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 218198630 is about 14771.5479892935. The cubic root of 218198630 is about 602.0289000596.

The spelling of 218198630 in words is "two hundred eighteen million, one hundred ninety-eight thousand, six hundred thirty".