220918061 has 16 divisors (see below), whose sum is σ = 272248704. Its totient is φ = 174567744.

The previous prime is 220918057. The next prime is 220918063. The reversal of 220918061 is 160819022.

It is not a de Polignac number, because 220918061 - 2² = 220918057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220918063) 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, 134135 + ... + 135771.

It is an arithmetic number, because the mean of its divisors is an integer number (17015544).

Almost surely, 2^220918061 is an apocalyptic number.

It is an amenable number.

220918061 is a deficient number, since it is larger than the sum of its proper divisors (51330643).

220918061 is a wasteful number, since it uses less digits than its factorization.

220918061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 220918061 is about 14863.3125850195. The cubic root of 220918061 is about 604.5196296148.

The spelling of 220918061 in words is "two hundred twenty million, nine hundred eighteen thousand, sixty-one".