221109226 has 16 divisors (see below), whose sum is σ = 363232800. Its totient is φ = 100320048.

The previous prime is 221109211. The next prime is 221109241. The reversal of 221109226 is 622901122.

It is an interprime number because it is at equal distance from previous prime (221109211) and next prime (221109241).

It is a self number, because there is not a number n which added to its sum of digits gives 221109226.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70536 + ... + 73603.

It is an arithmetic number, because the mean of its divisors is an integer number (22702050).

Almost surely, 2^221109226 is an apocalyptic number.

221109226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

221109226 is a deficient number, since it is larger than the sum of its proper divisors (142123574).

221109226 is a wasteful number, since it uses less digits than its factorization.

221109226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144213.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 221109226 is about 14869.7419614464. The cubic root of 221109226 is about 604.6939471535.

The spelling of 221109226 in words is "two hundred twenty-one million, one hundred nine thousand, two hundred twenty-six".