23210345 has 4 divisors (see below), whose sum is σ = 27852420. Its totient is φ = 18568272.

The previous prime is 23210323. The next prime is 23210347. The reversal of 23210345 is 54301232.

It is a happy number.

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 11812969 + 11397376 = 3437^2 + 3376^2 .

It is a cyclic number.

It is not a de Polignac number, because 23210345 - 2¹⁸ = 22948201 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23210347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2321030 + ... + 2321039.

It is an arithmetic number, because the mean of its divisors is an integer number (6963105).

Almost surely, 2^23210345 is an apocalyptic number.

It is an amenable number.

23210345 is a deficient number, since it is larger than the sum of its proper divisors (4642075).

23210345 is an equidigital number, since it uses as much as digits as its factorization.

23210345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4642074.

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

The square root of 23210345 is about 4817.7115936926. The cubic root of 23210345 is about 285.2510151301.

Adding to 23210345 its reverse (54301232), we get a palindrome (77511577).

The spelling of 23210345 in words is "twenty-three million, two hundred ten thousand, three hundred forty-five".