23220017 has 4 divisors (see below), whose sum is σ = 23286900. Its totient is φ = 23153136.

The previous prime is 23219983. The next prime is 23220019. The reversal of 23220017 is 71002232.

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 20394256 + 2825761 = 4516^2 + 1681^2 .

It is a cyclic number.

It is not a de Polignac number, because 23220017 - 2²⁰ = 22171441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23219977 and 23220004.

It is not an unprimeable number, because it can be changed into a prime (23220019) 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, 32918 + ... + 33615.

It is an arithmetic number, because the mean of its divisors is an integer number (5821725).

Almost surely, 2^23220017 is an apocalyptic number.

It is an amenable number.

23220017 is a deficient number, since it is larger than the sum of its proper divisors (66883).

23220017 is an equidigital number, since it uses as much as digits as its factorization.

23220017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66882.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 23220017 is about 4818.7152852187. The cubic root of 23220017 is about 285.2906320147.

Adding to 23220017 its reverse (71002232), we get a palindrome (94222249).

The spelling of 23220017 in words is "twenty-three million, two hundred twenty thousand, seventeen".