221333268 has 48 divisors (see below), whose sum is σ = 588893760. Its totient is φ = 64095744.

The previous prime is 221333267. The next prime is 221333269. The reversal of 221333268 is 862333122.

It is an interprime number because it is at equal distance from previous prime (221333267) and next prime (221333269).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221333267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39078 + ... + 44381.

It is an arithmetic number, because the mean of its divisors is an integer number (12268620).

Almost surely, 2^221333268 is an apocalyptic number.

It is an amenable number.

221333268 is an abundant number, since it is smaller than the sum of its proper divisors (367560492).

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

221333268 is a wasteful number, since it uses less digits than its factorization.

221333268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83496 (or 83494 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 221333268 is about 14877.2735405383. The cubic root of 221333268 is about 604.8981163954.

The spelling of 221333268 in words is "two hundred twenty-one million, three hundred thirty-three thousand, two hundred sixty-eight".