201998220 has 48 divisors (see below), whose sum is σ = 568124928. Its totient is φ = 53625280.

The previous prime is 201998197. The next prime is 201998221. The reversal of 201998220 is 22899102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (201998221) 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 in 15 ways as a sum of consecutive naturals, for example, 6205 + ... + 21035.

It is an arithmetic number, because the mean of its divisors is an integer number (11835936).

Almost surely, 2^201998220 is an apocalyptic number.

201998220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201998220 is an abundant number, since it is smaller than the sum of its proper divisors (366126708).

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

201998220 is a wasteful number, since it uses less digits than its factorization.

201998220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15070 (or 15068 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 201998220 is about 14212.6077832325. The cubic root of 201998220 is about 586.7447073926.

The spelling of 201998220 in words is "two hundred one million, nine hundred ninety-eight thousand, two hundred twenty".