220251 has 4 divisors (see below), whose sum is σ = 293672. Its totient is φ = 146832.

The previous prime is 220243. The next prime is 220279. The reversal of 220251 is 152022.

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

It is not a de Polignac number, because 220251 - 2³ = 220243 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220291) 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 3 ways as a sum of consecutive naturals, for example, 36706 + ... + 36711.

It is an arithmetic number, because the mean of its divisors is an integer number (73418).

2²²⁰²⁵¹ is an apocalyptic number.

220251 is a deficient number, since it is larger than the sum of its proper divisors (73421).

220251 is an equidigital number, since it uses as much as digits as its factorization.

220251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73420.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 220251 is about 469.3090666075. The cubic root of 220251 is about 60.3910568166.

Adding to 220251 its reverse (152022), we get a palindrome (372273).

The spelling of 220251 in words is "two hundred twenty thousand, two hundred fifty-one".