221276226 has 16 divisors (see below), whose sum is σ = 442844928. Its totient is φ = 73710000.

The previous prime is 221276203. The next prime is 221276227. The reversal of 221276226 is 622672122.

It is a junction number, because it is equal to n+sod(n) for n = 221276193 and 221276202.

It is not an unprimeable number, because it can be changed into a prime (221276227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1650 + ... + 21101.

It is an arithmetic number, because the mean of its divisors is an integer number (27677808).

Almost surely, 2^221276226 is an apocalyptic number.

221276226 is an abundant number, since it is smaller than the sum of its proper divisors (221568702).

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

221276226 is a wasteful number, since it uses less digits than its factorization.

221276226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24377.

The product of its digits is 8064, while the sum is 30.

The square root of 221276226 is about 14875.3563318665. The cubic root of 221276226 is about 604.8461471587.

The spelling of 221276226 in words is "two hundred twenty-one million, two hundred seventy-six thousand, two hundred twenty-six".