23506155 has 24 divisors (see below), whose sum is σ = 43142112. Its totient is φ = 11798784.

The previous prime is 23506141. The next prime is 23506159. The reversal of 23506155 is 55160532.

23506155 is a `hidden beast` number, since 2 + 3 + 506 + 155 = 666.

It is not a de Polignac number, because 23506155 - 2⁴ = 23506139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23506159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14599 + ... + 16128.

It is an arithmetic number, because the mean of its divisors is an integer number (1797588).

Almost surely, 2^23506155 is an apocalyptic number.

23506155 is a deficient number, since it is larger than the sum of its proper divisors (19635957).

23506155 is a wasteful number, since it uses less digits than its factorization.

23506155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30755 (or 30752 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 23506155 is about 4848.3146556303. The cubic root of 23506155 is about 286.4577206143.

Adding to 23506155 its reverse (55160532), we get a palindrome (78666687).

The spelling of 23506155 in words is "twenty-three million, five hundred six thousand, one hundred fifty-five".