23513147 has 4 divisors (see below), whose sum is σ = 26872176. Its totient is φ = 20154120.

The previous prime is 23513137. The next prime is 23513201. The reversal of 23513147 is 74131532.

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

It is not a de Polignac number, because 23513147 - 2⁸ = 23512891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23513117) 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, 1679504 + ... + 1679517.

It is an arithmetic number, because the mean of its divisors is an integer number (6718044).

Almost surely, 2^23513147 is an apocalyptic number.

23513147 is a deficient number, since it is larger than the sum of its proper divisors (3359029).

23513147 is an equidigital number, since it uses as much as digits as its factorization.

23513147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359028.

The product of its digits is 2520, while the sum is 26.

The square root of 23513147 is about 4849.0356773280. The cubic root of 23513147 is about 286.4861204642.

Adding to 23513147 its reverse (74131532), we get a palindrome (97644679).

The spelling of 23513147 in words is "twenty-three million, five hundred thirteen thousand, one hundred forty-seven".