221365234 has 8 divisors (see below), whose sum is σ = 342759168. Its totient is φ = 107112180.

The previous prime is 221365223. The next prime is 221365297. The reversal of 221365234 is 432563122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785142 + ... + 1785265.

It is an arithmetic number, because the mean of its divisors is an integer number (42844896).

Almost surely, 2^221365234 is an apocalyptic number.

221365234 is a deficient number, since it is larger than the sum of its proper divisors (121393934).

221365234 is a wasteful number, since it uses less digits than its factorization.

221365234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570440.

The product of its digits is 8640, while the sum is 28.

The square root of 221365234 is about 14878.3478249435. The cubic root of 221365234 is about 604.9272357449.

The spelling of 221365234 in words is "two hundred twenty-one million, three hundred sixty-five thousand, two hundred thirty-four".