221250226 has 4 divisors (see below), whose sum is σ = 331875342. Its totient is φ = 110625112.

The previous prime is 221250217. The next prime is 221250229. The reversal of 221250226 is 622052122.

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: 622052122 = 2 ⋅311026061.

It can be written as a sum of positive squares in only one way, i.e., 200081025 + 21169201 = 14145^2 + 4601^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 221250197 and 221250206.

It is not an unprimeable number, because it can be changed into a prime (221250229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55312555 + ... + 55312558.

Almost surely, 2^221250226 is an apocalyptic number.

221250226 is a deficient number, since it is larger than the sum of its proper divisors (110625116).

221250226 is a wasteful number, since it uses less digits than its factorization.

221250226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110625115.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 221250226 is about 14874.4823775485. The cubic root of 221250226 is about 604.8224563838.

The spelling of 221250226 in words is "two hundred twenty-one million, two hundred fifty thousand, two hundred twenty-six".