221540099 has 8 divisors (see below), whose sum is σ = 242053680. Its totient is φ = 201088800.

The previous prime is 221540089. The next prime is 221540101. The reversal of 221540099 is 990045122.

221540099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-221540099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221540009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7964 + ... + 22505.

It is an arithmetic number, because the mean of its divisors is an integer number (30256710).

Almost surely, 2^221540099 is an apocalyptic number.

221540099 is a deficient number, since it is larger than the sum of its proper divisors (20513581).

221540099 is a wasteful number, since it uses less digits than its factorization.

221540099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31141.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 221540099 is about 14884.2231574241. The cubic root of 221540099 is about 605.0864789979.

The spelling of 221540099 in words is "two hundred twenty-one million, five hundred forty thousand, ninety-nine".