23020221 has 8 divisors (see below), whose sum is σ = 35078464. Its totient is φ = 13154400.

The previous prime is 23020201. The next prime is 23020273. The reversal of 23020221 is 12202032.

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

It is not a de Polignac number, because 23020221 - 2⁹ = 23019709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23020197 and 23020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23020201) 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, 548080 + ... + 548121.

It is an arithmetic number, because the mean of its divisors is an integer number (4384808).

Almost surely, 2^23020221 is an apocalyptic number.

23020221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23020221 is a deficient number, since it is larger than the sum of its proper divisors (12058243).

23020221 is a wasteful number, since it uses less digits than its factorization.

23020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096211.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 23020221 is about 4797.9392451343. The cubic root of 23020221 is about 284.4700153618.

Adding to 23020221 its reverse (12202032), we get a palindrome (35222253).

The spelling of 23020221 in words is "twenty-three million, twenty thousand, two hundred twenty-one".