218131130 has 16 divisors (see below), whose sum is σ = 448727040. Its totient is φ = 74787792.

The previous prime is 218131091. The next prime is 218131141. The reversal of 218131130 is 31131812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1558010 + ... + 1558149.

It is an arithmetic number, because the mean of its divisors is an integer number (28045440).

Almost surely, 2^218131130 is an apocalyptic number.

218131130 is an abundant number, since it is smaller than the sum of its proper divisors (230595910).

218131130 is a wasteful number, since it uses less digits than its factorization.

218131130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116173.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 218131130 is about 14769.2630147885. The cubic root of 218131130 is about 601.9668142102.

Adding to 218131130 its reverse (31131812), we get a palindrome (249262942).

The spelling of 218131130 in words is "two hundred eighteen million, one hundred thirty-one thousand, one hundred thirty".