23320155 has 16 divisors (see below), whose sum is σ = 37414944. Its totient is φ = 12403200.

The previous prime is 23320151. The next prime is 23320181. The reversal of 23320155 is 55102332.

It is not a de Polignac number, because 23320155 - 2² = 23320151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23320151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4077 + ... + 7953.

It is an arithmetic number, because the mean of its divisors is an integer number (2338434).

Almost surely, 2^23320155 is an apocalyptic number.

23320155 is a deficient number, since it is larger than the sum of its proper divisors (14094789).

23320155 is a wasteful number, since it uses less digits than its factorization.

23320155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 23320155 is about 4829.0946356434. The cubic root of 23320155 is about 285.7001560274.

Adding to 23320155 its reverse (55102332), we get a palindrome (78422487).

The spelling of 23320155 in words is "twenty-three million, three hundred twenty thousand, one hundred fifty-five".