23155947 has 12 divisors (see below), whose sum is σ = 33623304. Its totient is φ = 15356160.

The previous prime is 23155919. The next prime is 23155981. The reversal of 23155947 is 74955132.

It is not a de Polignac number, because 23155947 - 2¹² = 23151851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23155987) 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 11 ways as a sum of consecutive naturals, for example, 4929 + ... + 8402.

It is an arithmetic number, because the mean of its divisors is an integer number (2801942).

Almost surely, 2^23155947 is an apocalyptic number.

23155947 is a deficient number, since it is larger than the sum of its proper divisors (10467357).

23155947 is a wasteful number, since it uses less digits than its factorization.

23155947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13530 (or 13527 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 23155947 is about 4812.0626554524. The cubic root of 23155947 is about 285.0279935569.

The spelling of 23155947 in words is "twenty-three million, one hundred fifty-five thousand, nine hundred forty-seven".