2198221543 has 4 divisors (see below), whose sum is σ = 2512253200. Its totient is φ = 1884189888.

The previous prime is 2198221523. The next prime is 2198221561. The reversal of 2198221543 is 3451228912.

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

It is not a de Polignac number, because 2198221543 - 2²¹ = 2196124391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198221523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157015818 + ... + 157015831.

It is an arithmetic number, because the mean of its divisors is an integer number (628063300).

Almost surely, 2^2198221543 is an apocalyptic number.

2198221543 is a deficient number, since it is larger than the sum of its proper divisors (314031657).

2198221543 is an equidigital number, since it uses as much as digits as its factorization.

2198221543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314031656.

The product of its digits is 34560, while the sum is 37.

The square root of 2198221543 is about 46885.1953499183. The cubic root of 2198221543 is about 1300.2408908630.

The spelling of 2198221543 in words is "two billion, one hundred ninety-eight million, two hundred twenty-one thousand, five hundred forty-three".