23221403 has 4 divisors (see below), whose sum is σ = 23231208. Its totient is φ = 23211600.

The previous prime is 23221391. The next prime is 23221411. The reversal of 23221403 is 30412232.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23221403 - 2⁸ = 23221147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23221103) 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, 1103 + ... + 6903.

It is an arithmetic number, because the mean of its divisors is an integer number (5807802).

Almost surely, 2^23221403 is an apocalyptic number.

23221403 is a deficient number, since it is larger than the sum of its proper divisors (9805).

23221403 is an equidigital number, since it uses as much as digits as its factorization.

23221403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9804.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 23221403 is about 4818.8590973383. The cubic root of 23221403 is about 285.2963082229.

Adding to 23221403 its reverse (30412232), we get a palindrome (53633635).

The spelling of 23221403 in words is "twenty-three million, two hundred twenty-one thousand, four hundred three".