221393498 has 16 divisors (see below), whose sum is σ = 340866240. Its totient is φ = 107787456.

The previous prime is 221393477. The next prime is 221393509. The reversal of 221393498 is 894393122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25163 + ... + 32801.

It is an arithmetic number, because the mean of its divisors is an integer number (21304140).

Almost surely, 2^221393498 is an apocalyptic number.

221393498 is a deficient number, since it is larger than the sum of its proper divisors (119472742).

221393498 is a wasteful number, since it uses less digits than its factorization.

221393498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8021.

The product of its digits is 93312, while the sum is 41.

The square root of 221393498 is about 14879.2976312728. The cubic root of 221393498 is about 604.9529804316.

The spelling of 221393498 in words is "two hundred twenty-one million, three hundred ninety-three thousand, four hundred ninety-eight".