220442 has 4 divisors (see below), whose sum is σ = 330666. Its totient is φ = 110220.

The previous prime is 220421. The next prime is 220447. The reversal of 220442 is 244022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244022 = 2 ⋅122011.

It can be written as a sum of positive squares in only one way, i.e., 212521 + 7921 = 461^2 + 89^2 .

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 as a sum of consecutive naturals, namely, 55109 + ... + 55112.

2²²⁰⁴⁴² is an apocalyptic number.

220442 is a deficient number, since it is larger than the sum of its proper divisors (110224).

220442 is a wasteful number, since it uses less digits than its factorization.

220442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110223.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 220442 is about 469.5125131453. The cubic root of 220442 is about 60.4085086620.

Adding to 220442 its reverse (244022), we get a palindrome (464464).

The spelling of 220442 in words is "two hundred twenty thousand, four hundred forty-two", and thus it is an iban number.