23221603 has 4 divisors (see below), whose sum is σ = 23234440. Its totient is φ = 23208768.

The previous prime is 23221537. The next prime is 23221631. The reversal of 23221603 is 30612232.

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

It is a cyclic number.

It is not a de Polignac number, because 23221603 - 2⁹ = 23221091 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, 3150 + ... + 7507.

It is an arithmetic number, because the mean of its divisors is an integer number (5808610).

Almost surely, 2^23221603 is an apocalyptic number.

23221603 is a deficient number, since it is larger than the sum of its proper divisors (12837).

23221603 is a wasteful number, since it uses less digits than its factorization.

23221603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12836.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 23221603 is about 4818.8798490936. The cubic root of 23221603 is about 285.2971272819.

Adding to 23221603 its reverse (30612232), we get a palindrome (53833835).

The spelling of 23221603 in words is "twenty-three million, two hundred twenty-one thousand, six hundred three".