221234890 has 8 divisors (see below), whose sum is σ = 398222820. Its totient is φ = 88493952.

The previous prime is 221234873. The next prime is 221234921. The reversal of 221234890 is 98432122.

It can be written as a sum of positive squares in 2 ways, for example, as 204004089 + 17230801 = 14283^2 + 4151^2 .

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, 11061735 + ... + 11061754.

Almost surely, 2^221234890 is an apocalyptic number.

221234890 is a deficient number, since it is larger than the sum of its proper divisors (176987930).

221234890 is a wasteful number, since it uses less digits than its factorization.

221234890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22123496.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 221234890 is about 14873.9668548777. The cubic root of 221234890 is about 604.8084816011.

The spelling of 221234890 in words is "two hundred twenty-one million, two hundred thirty-four thousand, eight hundred ninety".