220155405 has 16 divisors (see below), whose sum is σ = 358024704. Its totient is φ = 115490880.

The previous prime is 220155391. The next prime is 220155407. The reversal of 220155405 is 504551022.

It is a happy number.

It is not a de Polignac number, because 220155405 - 2¹⁰ = 220154381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220155407) 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, 119389 + ... + 121218.

It is an arithmetic number, because the mean of its divisors is an integer number (22376544).

Almost surely, 2^220155405 is an apocalyptic number.

It is an amenable number.

220155405 is a deficient number, since it is larger than the sum of its proper divisors (137869299).

220155405 is a wasteful number, since it uses less digits than its factorization.

220155405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240676.

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

The square root of 220155405 is about 14837.6347508624. The cubic root of 220155405 is about 603.8231842495.

The spelling of 220155405 in words is "two hundred twenty million, one hundred fifty-five thousand, four hundred five".