220557 has 8 divisors (see below), whose sum is σ = 302176. Its totient is φ = 142992.

The previous prime is 220553. The next prime is 220559. The reversal of 220557 is 755022.

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

It is not a de Polignac number, because 220557 - 2² = 220553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220557.

It is not an unprimeable number, because it can be changed into a prime (220553) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 883 + ... + 1104.

It is an arithmetic number, because the mean of its divisors is an integer number (37772).

2²²⁰⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

220557 is a deficient number, since it is larger than the sum of its proper divisors (81619).

220557 is a wasteful number, since it uses less digits than its factorization.

220557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027.

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 220557 is about 469.6349646268. The cubic root of 220557 is about 60.4190114561.

Adding to 220557 its reverse (755022), we get a palindrome (975579).

It can be divided in two parts, 220 and 557, that added together give a palindrome (777).

The spelling of 220557 in words is "two hundred twenty thousand, five hundred fifty-seven".