23032221 has 8 divisors (see below), whose sum is σ = 31055040.
Its totient is φ = 15182112.
The previous prime is 23032211. The next prime is 23032231. The reversal of 23032221 is 12223032.
It is an interprime number because it is at equal distance from previous prime (23032211) and next prime (23032231).
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 23032221 - 25 = 23032189 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 23032221.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (23032211) 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, 42865 + ... + 43398.
It is an arithmetic number, because the mean of its divisors is an integer number (3881880).
Almost surely, 223032221 is an apocalyptic number.
It is an amenable number.
23032221 is a deficient number, since it is larger than the sum of its proper divisors (8022819).
23032221 is an equidigital number, since it uses as much as digits as its factorization.
23032221 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 86355.
The product of its (nonzero) digits is 144, while the sum is 15.
The square root of 23032221 is about 4799.1896190920.
The cubic root of 23032221 is about 284.5194363643.
Adding to 23032221 its reverse (12223032), we get a palindrome (35255253).
The spelling of 23032221 in words is "twenty-three million, thirty-two thousand, two hundred twenty-one".