220214561 has 4 divisors (see below), whose sum is σ = 251673792. Its totient is φ = 188755332.

The previous prime is 220214557. The next prime is 220214587. The reversal of 220214561 is 165412022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220214561 - 2² = 220214557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220214531) 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, 15729605 + ... + 15729618.

It is an arithmetic number, because the mean of its divisors is an integer number (62918448).

Almost surely, 2^220214561 is an apocalyptic number.

It is an amenable number.

220214561 is a deficient number, since it is larger than the sum of its proper divisors (31459231).

220214561 is an equidigital number, since it uses as much as digits as its factorization.

220214561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31459230.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 220214561 is about 14839.6280613767. The cubic root of 220214561 is about 603.8772620579.

Adding to 220214561 its reverse (165412022), we get a palindrome (385626583).

The spelling of 220214561 in words is "two hundred twenty million, two hundred fourteen thousand, five hundred sixty-one".