23201655 has 16 divisors (see below), whose sum is σ = 37732704. Its totient is φ = 12170880.

The previous prime is 23201623. The next prime is 23201657. The reversal of 23201655 is 55610232.

It is not a de Polignac number, because 23201655 - 2⁵ = 23201623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23201657) 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 15 ways as a sum of consecutive naturals, for example, 11764 + ... + 13593.

It is an arithmetic number, because the mean of its divisors is an integer number (2358294).

Almost surely, 2^23201655 is an apocalyptic number.

23201655 is a deficient number, since it is larger than the sum of its proper divisors (14531049).

23201655 is a wasteful number, since it uses less digits than its factorization.

23201655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25426.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 23201655 is about 4816.8096287896. The cubic root of 23201655 is about 285.2154111678.

Adding to 23201655 its reverse (55610232), we get a palindrome (78811887).

The spelling of 23201655 in words is "twenty-three million, two hundred one thousand, six hundred fifty-five".