221000334 has 32 divisors (see below), whose sum is σ = 458161440. Its totient is φ = 71010432.

The previous prime is 221000327. The next prime is 221000347. The reversal of 221000334 is 433000122.

It is a super-2 number, since 2×221000334² = 97682295256223112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19632 + ... + 28764.

It is an arithmetic number, because the mean of its divisors is an integer number (14317545).

Almost surely, 2^221000334 is an apocalyptic number.

221000334 is an abundant number, since it is smaller than the sum of its proper divisors (237161106).

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

221000334 is a wasteful number, since it uses less digits than its factorization.

221000334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9284.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 221000334 is about 14866.0799809499. The cubic root of 221000334 is about 604.5946641780.

Adding to 221000334 its reverse (433000122), we get a palindrome (654000456).

The spelling of 221000334 in words is "two hundred twenty-one million, three hundred thirty-four", and thus it is an aban number.