218294061181 has 32 divisors (see below), whose sum is σ = 253748000000. Its totient is φ = 183938107392.

The previous prime is 218294061169. The next prime is 218294061257. The reversal of 218294061181 is 181160492812.

It is a 12-Lehmer number, since φ(218294061181) divides (218294061181-1)¹².

It is a cyclic number.

It is not a de Polignac number, because 218294061181 - 2²³ = 218285672573 is a prime.

It is a super-2 number, since 2×218294061181² (a number of 23 digits) contains 22 as substring.

It is the 467220-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218294061581) by changing a digit.

It is a nontrivial repunit in base 467219.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149618230 + ... + 149619688.

It is an arithmetic number, because the mean of its divisors is an integer number (7929625000).

Almost surely, 2^218294061181 is an apocalyptic number.

It is an amenable number.

218294061181 is a deficient number, since it is larger than the sum of its proper divisors (35453938819).

218294061181 is a wasteful number, since it uses less digits than its factorization.

218294061181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981.

The product of its (nonzero) digits is 55296, while the sum is 43.

The spelling of 218294061181 in words is "two hundred eighteen billion, two hundred ninety-four million, sixty-one thousand, one hundred eighty-one".