220061 has 4 divisors (see below), whose sum is σ = 221052. Its totient is φ = 219072.

The previous prime is 220057. The next prime is 220063. The reversal of 220061 is 160022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 55225 + 164836 = 235^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 220061 - 2² = 220057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220063) 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, 11 + ... + 663.

It is an arithmetic number, because the mean of its divisors is an integer number (55263).

2²²⁰⁰⁶¹ is an apocalyptic number.

It is an amenable number.

220061 is a deficient number, since it is larger than the sum of its proper divisors (991).

220061 is an equidigital number, since it uses as much as digits as its factorization.

220061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 220061 is about 469.1065976940. The cubic root of 220061 is about 60.3736863290.

Adding to 220061 its reverse (160022), we get a palindrome (380083).

The spelling of 220061 in words is "two hundred twenty thousand, sixty-one".