202221091 has 8 divisors (see below), whose sum is σ = 209810304. Its totient is φ = 194698560.

The previous prime is 202221079. The next prime is 202221109. The reversal of 202221091 is 190122202.

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

It is a cyclic number.

It is not a de Polignac number, because 202221091 - 2¹⁵ = 202188323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202221011) 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, 10450 + ... + 22663.

It is an arithmetic number, because the mean of its divisors is an integer number (26226288).

Almost surely, 2^202221091 is an apocalyptic number.

202221091 is a deficient number, since it is larger than the sum of its proper divisors (7589213).

202221091 is a wasteful number, since it uses less digits than its factorization.

202221091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33341.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 202221091 is about 14220.4462306919. The cubic root of 202221091 is about 586.9604193850.

Adding to 202221091 its reverse (190122202), we get a palindrome (392343293).

The spelling of 202221091 in words is "two hundred two million, two hundred twenty-one thousand, ninety-one".