220405155 has 8 divisors (see below), whose sum is σ = 352648272. Its totient is φ = 117549408.

The previous prime is 220405151. The next prime is 220405169. The reversal of 220405155 is 551504022.

It is a happy number.

220405155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 220405155 - 2² = 220405151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220405151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7346824 + ... + 7346853.

It is an arithmetic number, because the mean of its divisors is an integer number (44081034).

Almost surely, 2^220405155 is an apocalyptic number.

220405155 is a deficient number, since it is larger than the sum of its proper divisors (132243117).

220405155 is a wasteful number, since it uses less digits than its factorization.

220405155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14693685.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 220405155 is about 14846.0484641537. The cubic root of 220405155 is about 604.0514288548.

Adding to 220405155 its reverse (551504022), we get a palindrome (771909177).

The spelling of 220405155 in words is "two hundred twenty million, four hundred five thousand, one hundred fifty-five".