23905155 has 16 divisors (see below), whose sum is σ = 38342304. Its totient is φ = 12718080.

The previous prime is 23905139. The next prime is 23905157. The reversal of 23905155 is 55150932.

23905155 is a nontrivial binomial coefficient, being equal to C(6915, 2).

It is not a de Polignac number, because 23905155 - 2⁴ = 23905139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23905157) 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, 5187 + ... + 8643.

It is an arithmetic number, because the mean of its divisors is an integer number (2396394).

Almost surely, 2^23905155 is an apocalyptic number.

23905155 is the 6914-th triangular number.

23905155 is a deficient number, since it is larger than the sum of its proper divisors (14437149).

23905155 is a wasteful number, since it uses less digits than its factorization.

23905155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3926.

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 23905155 is about 4889.2898257313. The cubic root of 23905155 is about 288.0694397568.

The spelling of 23905155 in words is "twenty-three million, nine hundred five thousand, one hundred fifty-five".