218140122 has 8 divisors (see below), whose sum is σ = 436280256. Its totient is φ = 72713372.

The previous prime is 218140061. The next prime is 218140127. The reversal of 218140122 is 221041812.

It is a sphenic number, since it is the product of 3 distinct primes.

218140122 is an admirable number.

It is a super-2 number, since 2×218140122² = 95170225652349768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (218140127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18178338 + ... + 18178349.

It is an arithmetic number, because the mean of its divisors is an integer number (54535032).

Almost surely, 2^218140122 is an apocalyptic number.

218140122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218140122 is a wasteful number, since it uses less digits than its factorization.

218140122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36356692.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 218140122 is about 14769.5674276534. The cubic root of 218140122 is about 601.9750857045.

Adding to 218140122 its reverse (221041812), we get a palindrome (439181934).

The spelling of 218140122 in words is "two hundred eighteen million, one hundred forty thousand, one hundred twenty-two".