102220198 has 4 divisors (see below), whose sum is σ = 153330300. Its totient is φ = 51110098.

The previous prime is 102220193. The next prime is 102220207. The reversal of 102220198 is 891022201.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220193) by changing a digit.

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 as a sum of consecutive naturals, namely, 25555048 + ... + 25555051.

It is an arithmetic number, because the mean of its divisors is an integer number (38332575).

Almost surely, 2^102220198 is an apocalyptic number.

102220198 is a deficient number, since it is larger than the sum of its proper divisors (51110102).

102220198 is an equidigital number, since it uses as much as digits as its factorization.

102220198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51110101.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 102220198 is about 10110.4004866276. The cubic root of 102220198 is about 467.5688525660.

Adding to 102220198 its reverse (891022201), we get a palindrome (993242399).

The spelling of 102220198 in words is "one hundred two million, two hundred twenty thousand, one hundred ninety-eight".