202116091 has 4 divisors (see below), whose sum is σ = 212753800. Its totient is φ = 191478384.

The previous prime is 202116071. The next prime is 202116113. The reversal of 202116091 is 190611202.

202116091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190611202 = 2 ⋅95305601.

It is a cyclic number.

It is not a de Polignac number, because 202116091 - 2⁵ = 202116059 is a prime.

It is a super-2 number, since 2×202116091² = 81701828482240562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202116011) 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, 5318826 + ... + 5318863.

It is an arithmetic number, because the mean of its divisors is an integer number (53188450).

Almost surely, 2^202116091 is an apocalyptic number.

202116091 is a deficient number, since it is larger than the sum of its proper divisors (10637709).

202116091 is a wasteful number, since it uses less digits than its factorization.

202116091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10637708.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 202116091 is about 14216.7538840623. The cubic root of 202116091 is about 586.8588119253.

Adding to 202116091 its reverse (190611202), we get a palindrome (392727293).

The spelling of 202116091 in words is "two hundred two million, one hundred sixteen thousand, ninety-one".