1000220198 has 4 divisors (see below), whose sum is σ = 1500330300. Its totient is φ = 500110098.

The previous prime is 1000220183. The next prime is 1000220209. The reversal of 1000220198 is 8910220001.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250055048 + ... + 250055051.

It is an arithmetic number, because the mean of its divisors is an integer number (375082575).

Almost surely, 2^1000220198 is an apocalyptic number.

1000220198 is a deficient number, since it is larger than the sum of its proper divisors (500110102).

1000220198 is an equidigital number, since it uses as much as digits as its factorization.

1000220198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500110101.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1000220198 is about 31626.2580461236. The cubic root of 1000220198 is about 1000.0733939465.

Adding to 1000220198 its reverse (8910220001), we get a palindrome (9910440199).

The spelling of 1000220198 in words is "one billion, two hundred twenty thousand, one hundred ninety-eight".