221750226 has 24 divisors (see below), whose sum is σ = 491634000. Its totient is φ = 72197496.

The previous prime is 221750219. The next prime is 221750233. The reversal of 221750226 is 622057122.

It is an interprime number because it is at equal distance from previous prime (221750219) and next prime (221750233).

It is a self number, because there is not a number n which added to its sum of digits gives 221750226.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142476 + ... + 144023.

It is an arithmetic number, because the mean of its divisors is an integer number (20484750).

Almost surely, 2^221750226 is an apocalyptic number.

221750226 is an abundant number, since it is smaller than the sum of its proper divisors (269883774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221750226 is a wasteful number, since it uses less digits than its factorization.

221750226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286550 (or 286547 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 221750226 is about 14891.2802001708. The cubic root of 221750226 is about 605.2777232769.

The spelling of 221750226 in words is "two hundred twenty-one million, seven hundred fifty thousand, two hundred twenty-six".