23521345 has 8 divisors (see below), whose sum is σ = 28276776. Its totient is φ = 18782976.

The previous prime is 23521339. The next prime is 23521357. The reversal of 23521345 is 54312532.

It can be written as a sum of positive squares in 4 ways, for example, as 1656369 + 21864976 = 1287^2 + 4676^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 23521345 - 2⁵ = 23521313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1002 + ... + 6931.

It is an arithmetic number, because the mean of its divisors is an integer number (3534597).

Almost surely, 2^23521345 is an apocalyptic number.

It is an amenable number.

23521345 is a deficient number, since it is larger than the sum of its proper divisors (4755431).

23521345 is an equidigital number, since it uses as much as digits as its factorization.

23521345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8531.

The product of its digits is 3600, while the sum is 25.

The square root of 23521345 is about 4849.8809263733. The cubic root of 23521345 is about 286.5194116313.

Adding to 23521345 its reverse (54312532), we get a palindrome (77833877).

The spelling of 23521345 in words is "twenty-three million, five hundred twenty-one thousand, three hundred forty-five".