23221039 has 4 divisors (see below), whose sum is σ = 23231880. Its totient is φ = 23210200.

The previous prime is 23221019. The next prime is 23221063. The reversal of 23221039 is 93012232.

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 23221039 - 2¹⁵ = 23188271 is a prime.

It is a super-3 number, since 3×23221039³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1012 + ... + 6889.

It is an arithmetic number, because the mean of its divisors is an integer number (5807970).

Almost surely, 2^23221039 is an apocalyptic number.

23221039 is a deficient number, since it is larger than the sum of its proper divisors (10841).

23221039 is an equidigital number, since it uses as much as digits as its factorization.

23221039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10840.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 23221039 is about 4818.8213289144. The cubic root of 23221039 is about 285.2948175234.

The spelling of 23221039 in words is "twenty-three million, two hundred twenty-one thousand, thirty-nine".