23145545 has 8 divisors (see below), whose sum is σ = 27832896. Its totient is φ = 18477616.

The previous prime is 23145541. The next prime is 23145547. The reversal of 23145545 is 54554132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23145545 - 2² = 23145541 is a prime.

It is a super-3 number, since 3×23145545³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23145541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2087 + ... + 7116.

It is an arithmetic number, because the mean of its divisors is an integer number (3479112).

Almost surely, 2^23145545 is an apocalyptic number.

It is an amenable number.

23145545 is a deficient number, since it is larger than the sum of its proper divisors (4687351).

23145545 is an equidigital number, since it uses as much as digits as its factorization.

23145545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9711.

The product of its digits is 12000, while the sum is 29.

The square root of 23145545 is about 4810.9817085497. The cubic root of 23145545 is about 284.9853075426.

Adding to 23145545 its reverse (54554132), we get a palindrome (77699677).

The spelling of 23145545 in words is "twenty-three million, one hundred forty-five thousand, five hundred forty-five".