220427 has 4 divisors (see below), whose sum is σ = 224640. Its totient is φ = 216216.

The previous prime is 220421. The next prime is 220447. The reversal of 220427 is 724022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220427 - 2⁴ = 220411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2027 + ... + 2132.

It is an arithmetic number, because the mean of its divisors is an integer number (56160).

2²²⁰⁴²⁷ is an apocalyptic number.

220427 is a deficient number, since it is larger than the sum of its proper divisors (4213).

220427 is an equidigital number, since it uses as much as digits as its factorization.

220427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212.

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 220427 is about 469.4965388584. The cubic root of 220427 is about 60.4071384631.

Adding to 220427 its reverse (724022), we get a palindrome (944449).

The spelling of 220427 in words is "two hundred twenty thousand, four hundred twenty-seven", and thus it is an iban number.