221330334 has 16 divisors (see below), whose sum is σ = 461907072. Its totient is φ = 70569048.

The previous prime is 221330309. The next prime is 221330339. The reversal of 221330334 is 433033122.

It is a self number, because there is not a number n which added to its sum of digits gives 221330334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221330339) 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, 801784 + ... + 802059.

It is an arithmetic number, because the mean of its divisors is an integer number (28869192).

Almost surely, 2^221330334 is an apocalyptic number.

221330334 is an abundant number, since it is smaller than the sum of its proper divisors (240576738).

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

221330334 is a wasteful number, since it uses less digits than its factorization.

221330334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603871.

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 221330334 is about 14877.1749334341. The cubic root of 221330334 is about 604.8954435348.

Adding to 221330334 its reverse (433033122), we get a palindrome (654363456).

The spelling of 221330334 in words is "two hundred twenty-one million, three hundred thirty thousand, three hundred thirty-four".