23352221 has 4 divisors (see below), whose sum is σ = 24157500. Its totient is φ = 22546944.

The previous prime is 23352211. The next prime is 23352227. The reversal of 23352221 is 12225332.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9765625 + 13586596 = 3125^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 23352221 - 2⁶ = 23352157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23352193 and 23352202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23352227) 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, 402596 + ... + 402653.

It is an arithmetic number, because the mean of its divisors is an integer number (6039375).

Almost surely, 2^23352221 is an apocalyptic number.

It is an amenable number.

23352221 is a deficient number, since it is larger than the sum of its proper divisors (805279).

23352221 is an equidigital number, since it uses as much as digits as its factorization.

23352221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805278.

The product of its digits is 720, while the sum is 20.

The square root of 23352221 is about 4832.4135791548. The cubic root of 23352221 is about 285.8310451717.

Adding to 23352221 its reverse (12225332), we get a palindrome (35577553).

The spelling of 23352221 in words is "twenty-three million, three hundred fifty-two thousand, two hundred twenty-one".