220455 has 32 divisors (see below), whose sum is σ = 414720. Its totient is φ = 110880.

The previous prime is 220447. The next prime is 220469. The reversal of 220455 is 554022.

220455 = T₇₄ + T₇₅ + ... + T₁₁₉.

It is not a de Polignac number, because 220455 - 2³ = 220447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3070 + ... + 3140.

It is an arithmetic number, because the mean of its divisors is an integer number (12960).

2²²⁰⁴⁵⁵ is an apocalyptic number.

220455 is a deficient number, since it is larger than the sum of its proper divisors (194265).

220455 is a wasteful number, since it uses less digits than its factorization.

220455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 220455 is about 469.5263570877. The cubic root of 220455 is about 60.4096961175.

Adding to 220455 its reverse (554022), we get a palindrome (774477).

The spelling of 220455 in words is "two hundred twenty thousand, four hundred fifty-five".