218540102 has 16 divisors (see below), whose sum is σ = 358703424. Its totient is φ = 99033000.

The previous prime is 218540029. The next prime is 218540107. The reversal of 218540102 is 201045812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218540107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7724 + ... + 22287.

It is an arithmetic number, because the mean of its divisors is an integer number (22418964).

Almost surely, 2^218540102 is an apocalyptic number.

218540102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

218540102 is a deficient number, since it is larger than the sum of its proper divisors (140163322).

218540102 is a wasteful number, since it uses less digits than its factorization.

218540102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30355.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 218540102 is about 14783.1019072453. The cubic root of 218540102 is about 602.3427866413.

Adding to 218540102 its reverse (201045812), we get a palindrome (419585914).

The spelling of 218540102 in words is "two hundred eighteen million, five hundred forty thousand, one hundred two".