23545513 has 4 divisors (see below), whose sum is σ = 23690128. Its totient is φ = 23400900.

The previous prime is 23545463. The next prime is 23545519. The reversal of 23545513 is 31554532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23545513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23545519) 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 3 ways as a sum of consecutive naturals, for example, 72063 + ... + 72388.

It is an arithmetic number, because the mean of its divisors is an integer number (5922532).

Almost surely, 2^23545513 is an apocalyptic number.

It is an amenable number.

23545513 is a deficient number, since it is larger than the sum of its proper divisors (144615).

23545513 is a wasteful number, since it uses less digits than its factorization.

23545513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144614.

The product of its digits is 9000, while the sum is 28.

The square root of 23545513 is about 4852.3718942389. The cubic root of 23545513 is about 286.6175102000.

The spelling of 23545513 in words is "twenty-three million, five hundred forty-five thousand, five hundred thirteen".