236066221 has 4 divisors (see below), whose sum is σ = 236779744. Its totient is φ = 235352700.

The previous prime is 236066219. The next prime is 236066231. The reversal of 236066221 is 122660632.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 236066221 - 2¹ = 236066219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 236066221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (236066231) 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 3 ways as a sum of consecutive naturals, for example, 356265 + ... + 356926.

It is an arithmetic number, because the mean of its divisors is an integer number (59194936).

Almost surely, 2^236066221 is an apocalyptic number.

It is an amenable number.

236066221 is a deficient number, since it is larger than the sum of its proper divisors (713523).

236066221 is an equidigital number, since it uses as much as digits as its factorization.

236066221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713522.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 236066221 is about 15364.4466545333. The cubic root of 236066221 is about 618.0324558874.

The spelling of 236066221 in words is "two hundred thirty-six million, sixty-six thousand, two hundred twenty-one".