23158145 has 4 divisors (see below), whose sum is σ = 27789780. Its totient is φ = 18526512.

The previous prime is 23158133. The next prime is 23158159. The reversal of 23158145 is 54185132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14684224 + 8473921 = 3832^2 + 2911^2 .

It is a cyclic number.

It is not a de Polignac number, because 23158145 - 2⁴ = 23158129 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2315810 + ... + 2315819.

It is an arithmetic number, because the mean of its divisors is an integer number (6947445).

Almost surely, 2^23158145 is an apocalyptic number.

It is an amenable number.

23158145 is a deficient number, since it is larger than the sum of its proper divisors (4631635).

23158145 is an equidigital number, since it uses as much as digits as its factorization.

23158145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4631634.

The product of its digits is 4800, while the sum is 29.

The square root of 23158145 is about 4812.2910344242. The cubic root of 23158145 is about 285.0370117111.

The spelling of 23158145 in words is "twenty-three million, one hundred fifty-eight thousand, one hundred forty-five".