220655405 has 8 divisors (see below), whose sum is σ = 265155072. Its totient is φ = 176278608.

The previous prime is 220655389. The next prime is 220655419. The reversal of 220655405 is 504556022.

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

It is a cyclic number.

It is not a de Polignac number, because 220655405 - 2⁴ = 220655389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26717 + ... + 33986.

It is an arithmetic number, because the mean of its divisors is an integer number (33144384).

Almost surely, 2^220655405 is an apocalyptic number.

It is an amenable number.

220655405 is a deficient number, since it is larger than the sum of its proper divisors (44499667).

220655405 is an equidigital number, since it uses as much as digits as its factorization.

220655405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61435.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 220655405 is about 14854.4742417899. The cubic root of 220655405 is about 604.2799575314.

The spelling of 220655405 in words is "two hundred twenty million, six hundred fifty-five thousand, four hundred five".