23530155 has 16 divisors (see below), whose sum is σ = 41071104. Its totient is φ = 11408480.

The previous prime is 23530141. The next prime is 23530183. The reversal of 23530155 is 55103532.

It is not a de Polignac number, because 23530155 - 2⁷ = 23530027 is a prime.

It is an unprimeable number.

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, 71139 + ... + 71468.

It is an arithmetic number, because the mean of its divisors is an integer number (2566944).

Almost surely, 2^23530155 is an apocalyptic number.

23530155 is a deficient number, since it is larger than the sum of its proper divisors (17540949).

23530155 is a wasteful number, since it uses less digits than its factorization.

23530155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142626.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 23530155 is about 4850.7891110622. The cubic root of 23530155 is about 286.5551794403. Note that the first 3 decimals are identical.

Adding to 23530155 its reverse (55103532), we get a palindrome (78633687).

The spelling of 23530155 in words is "twenty-three million, five hundred thirty thousand, one hundred fifty-five".