23220401 has 4 divisors (see below), whose sum is σ = 23230704. Its totient is φ = 23210100.

The previous prime is 23220389. The next prime is 23220403. The reversal of 23220401 is 10402232.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23220401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23220403) 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, 155 + ... + 6816.

It is an arithmetic number, because the mean of its divisors is an integer number (5807676).

Almost surely, 2^23220401 is an apocalyptic number.

It is an amenable number.

23220401 is a deficient number, since it is larger than the sum of its proper divisors (10303).

23220401 is an equidigital number, since it uses as much as digits as its factorization.

23220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10302.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 23220401 is about 4818.7551296990. The cubic root of 23220401 is about 285.2922046665.

Adding to 23220401 its reverse (10402232), we get a palindrome (33622633).

The spelling of 23220401 in words is "twenty-three million, two hundred twenty thousand, four hundred one".