220457 has 8 divisors (see below), whose sum is σ = 238560. Its totient is φ = 203040.

The previous prime is 220447. The next prime is 220469. The reversal of 220457 is 754022.

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 220457 - 2¹⁰ = 219433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (29820).

2²²⁰⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

220457 is a deficient number, since it is larger than the sum of its proper divisors (18103).

220457 is a wasteful number, since it uses less digits than its factorization.

220457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 220457 is about 469.5284868887. The cubic root of 220457 is about 60.4098787988.

Adding to 220457 its reverse (754022), we get a palindrome (974479).

The spelling of 220457 in words is "two hundred twenty thousand, four hundred fifty-seven".