221298898 has 16 divisors (see below), whose sum is σ = 342856800. Its totient is φ = 107061696.

The previous prime is 221298859. The next prime is 221298929. The reversal of 221298898 is 898892122.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2823 + ... + 21226.

It is an arithmetic number, because the mean of its divisors is an integer number (21428550).

Almost surely, 2^221298898 is an apocalyptic number.

221298898 is a deficient number, since it is larger than the sum of its proper divisors (121557902).

221298898 is a wasteful number, since it uses less digits than its factorization.

221298898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24201.

The product of its digits is 331776, while the sum is 49.

The square root of 221298898 is about 14876.1183781254. The cubic root of 221298898 is about 604.8668039998.

The spelling of 221298898 in words is "two hundred twenty-one million, two hundred ninety-eight thousand, eight hundred ninety-eight".