23221533 has 8 divisors (see below), whose sum is σ = 31799008. Its totient is φ = 15062544.

The previous prime is 23221531. The next prime is 23221537. The reversal of 23221533 is 33512232.

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

It is not a de Polignac number, because 23221533 - 2¹ = 23221531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221531) 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, 104491 + ... + 104712.

It is an arithmetic number, because the mean of its divisors is an integer number (3974876).

Almost surely, 2^23221533 is an apocalyptic number.

It is an amenable number.

23221533 is a deficient number, since it is larger than the sum of its proper divisors (8577475).

23221533 is a wasteful number, since it uses less digits than its factorization.

23221533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209243.

The product of its digits is 1080, while the sum is 21.

The square root of 23221533 is about 4818.8725859894. The cubic root of 23221533 is about 285.2968406118.

Adding to 23221533 its reverse (33512232), we get a palindrome (56733765).

The spelling of 23221533 in words is "twenty-three million, two hundred twenty-one thousand, five hundred thirty-three".