23005145 has 4 divisors (see below), whose sum is σ = 27606180. Its totient is φ = 18404112.

The previous prime is 23005123. The next prime is 23005163. The reversal of 23005145 is 54150032.

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 18386944 + 4618201 = 4288^2 + 2149^2 .

It is a cyclic number.

It is not a de Polignac number, because 23005145 - 2¹² = 23001049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2300510 + ... + 2300519.

It is an arithmetic number, because the mean of its divisors is an integer number (6901545).

Almost surely, 2^23005145 is an apocalyptic number.

It is an amenable number.

23005145 is a deficient number, since it is larger than the sum of its proper divisors (4601035).

23005145 is an equidigital number, since it uses as much as digits as its factorization.

23005145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601034.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 23005145 is about 4796.3678966485. The cubic root of 23005145 is about 284.4079017601.

Adding to 23005145 its reverse (54150032), we get a palindrome (77155177).

The spelling of 23005145 in words is "twenty-three million, five thousand, one hundred forty-five".