23208505 has 8 divisors (see below), whose sum is σ = 28097352. Its totient is φ = 18402048.

The previous prime is 23208503. The next prime is 23208517. The reversal of 23208505 is 50580232.

It can be written as a sum of positive squares in 4 ways, for example, as 1530169 + 21678336 = 1237^2 + 4656^2 .

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 23208505 - 2¹ = 23208503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23208505.

It is not an unprimeable number, because it can be changed into a prime (23208503) 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, 19974 + ... + 21103.

It is an arithmetic number, because the mean of its divisors is an integer number (3512169).

Almost surely, 2^23208505 is an apocalyptic number.

It is an amenable number.

23208505 is a deficient number, since it is larger than the sum of its proper divisors (4888847).

23208505 is a wasteful number, since it uses less digits than its factorization.

23208505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41195.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 23208505 is about 4817.5206278749. The cubic root of 23208505 is about 285.2434771733.

Adding to 23208505 its reverse (50580232), we get a palindrome (73788737).

The spelling of 23208505 in words is "twenty-three million, two hundred eight thousand, five hundred five".