221116146 has 8 divisors (see below), whose sum is σ = 442232304. Its totient is φ = 73705380.

The previous prime is 221116121. The next prime is 221116151. The reversal of 221116146 is 641611122.

It is a happy number.

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

221116146 is an admirable number.

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, 18426340 + ... + 18426351.

It is an arithmetic number, because the mean of its divisors is an integer number (55279038).

Almost surely, 2^221116146 is an apocalyptic number.

221116146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221116146 is a wasteful number, since it uses less digits than its factorization.

221116146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36852696.

The product of its digits is 576, while the sum is 24.

The square root of 221116146 is about 14869.9746469185. The cubic root of 221116146 is about 604.7002554060.

Adding to 221116146 its reverse (641611122), we get a palindrome (862727268).

The spelling of 221116146 in words is "two hundred twenty-one million, one hundred sixteen thousand, one hundred forty-six".