221134284 has 72 divisors (see below), whose sum is σ = 659463168. Its totient is φ = 61140960.

The previous prime is 221134271. The next prime is 221134297. The reversal of 221134284 is 482431122.

221134284 is a `hidden beast` number, since 221 + 13 + 428 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (221134271) and next prime (221134297).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6342 + ... + 21965.

Almost surely, 2^221134284 is an apocalyptic number.

It is an amenable number.

221134284 is an abundant number, since it is smaller than the sum of its proper divisors (438328884).

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

221134284 is a wasteful number, since it uses less digits than its factorization.

221134284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28355 (or 28350 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 221134284 is about 14870.5845211276. The cubic root of 221134284 is about 604.7167893310.

The spelling of 221134284 in words is "two hundred twenty-one million, one hundred thirty-four thousand, two hundred eighty-four".