220839505 has 8 divisors (see below), whose sum is σ = 273556224. Its totient is φ = 170972400.

The previous prime is 220839481. The next prime is 220839533. The reversal of 220839505 is 505938022.

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

It is not a de Polignac number, because 220839505 - 2¹¹ = 220837457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712231 + ... + 712540.

It is an arithmetic number, because the mean of its divisors is an integer number (34194528).

Almost surely, 2^220839505 is an apocalyptic number.

It is an amenable number.

220839505 is a deficient number, since it is larger than the sum of its proper divisors (52716719).

220839505 is a wasteful number, since it uses less digits than its factorization.

220839505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424807.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 220839505 is about 14860.6697359170. The cubic root of 220839505 is about 604.4479676394.

The spelling of 220839505 in words is "two hundred twenty million, eight hundred thirty-nine thousand, five hundred five".