222250561 has 4 divisors (see below), whose sum is σ = 239346772. Its totient is φ = 205154352.

The previous prime is 222250549. The next prime is 222250603. The reversal of 222250561 is 165052222.

It is a happy number.

222250561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 149915536 + 72335025 = 12244^2 + 8505^2 .

It is not a de Polignac number, because 222250561 - 2²³ = 213861953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222250361) 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, 8548086 + ... + 8548111.

It is an arithmetic number, because the mean of its divisors is an integer number (59836693).

Almost surely, 2^222250561 is an apocalyptic number.

It is an amenable number.

222250561 is a deficient number, since it is larger than the sum of its proper divisors (17096211).

222250561 is a wasteful number, since it uses less digits than its factorization.

222250561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17096210.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 222250561 is about 14908.0703311998. The cubic root of 222250561 is about 605.7326106713.

The spelling of 222250561 in words is "two hundred twenty-two million, two hundred fifty thousand, five hundred sixty-one".