220197155 has 4 divisors (see below), whose sum is σ = 264236592. Its totient is φ = 176157720.

The previous prime is 220197149. The next prime is 220197157. The reversal of 220197155 is 551791022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 220197155 - 2¹⁶ = 220131619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220197157) 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, 22019711 + ... + 22019720.

It is an arithmetic number, because the mean of its divisors is an integer number (66059148).

Almost surely, 2^220197155 is an apocalyptic number.

220197155 is a deficient number, since it is larger than the sum of its proper divisors (44039437).

220197155 is an equidigital number, since it uses as much as digits as its factorization.

220197155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44039436.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 220197155 is about 14839.0415795630. The cubic root of 220197155 is about 603.8613512654.

The spelling of 220197155 in words is "two hundred twenty million, one hundred ninety-seven thousand, one hundred fifty-five".