23505147 has 28 divisors (see below), whose sum is σ = 37118280. Its totient is φ = 14836608.

The previous prime is 23505143. The next prime is 23505173. The reversal of 23505147 is 74150532.

It is a happy number.

It is not a de Polignac number, because 23505147 - 2² = 23505143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 23505147.

It is not an unprimeable number, because it can be changed into a prime (23505143) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 13003 + ... + 14699.

Almost surely, 2^23505147 is an apocalyptic number.

23505147 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

23505147 is a deficient number, since it is larger than the sum of its proper divisors (13613133).

23505147 is an equidigital number, since it uses as much as digits as its factorization.

23505147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734 (or 1719 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 23505147 is about 4848.2107008669. The cubic root of 23505147 is about 286.4536258923.

Adding to 23505147 its reverse (74150532), we get a palindrome (97655679).

The spelling of 23505147 in words is "twenty-three million, five hundred five thousand, one hundred forty-seven".