23216201 has 4 divisors (see below), whose sum is σ = 23300292. Its totient is φ = 23132112.

The previous prime is 23216183. The next prime is 23216239. The reversal of 23216201 is 10261232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13512976 + 9703225 = 3676^2 + 3115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23216201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23216201.

It is not an unprimeable number, because it can be changed into a prime (23216251) 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, 41630 + ... + 42183.

It is an arithmetic number, because the mean of its divisors is an integer number (5825073).

Almost surely, 2^23216201 is an apocalyptic number.

23216201 is the 2576-th centered heptagonal number.

It is an amenable number.

23216201 is a deficient number, since it is larger than the sum of its proper divisors (84091).

23216201 is an equidigital number, since it uses as much as digits as its factorization.

23216201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84090.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 23216201 is about 4818.3193127895. The cubic root of 23216201 is about 285.2750028460.

Adding to 23216201 its reverse (10261232), we get a palindrome (33477433).

The spelling of 23216201 in words is "twenty-three million, two hundred sixteen thousand, two hundred one".