23132539 has 4 divisors (see below), whose sum is σ = 23569056. Its totient is φ = 22696024.

The previous prime is 23132521. The next prime is 23132561. The reversal of 23132539 is 93523132.

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

It is a cyclic number.

It is not a de Polignac number, because 23132539 - 2¹¹ = 23130491 is a prime.

It is a super-2 number, since 2×23132539² = 1070228721173042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23132509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218179 + ... + 218284.

It is an arithmetic number, because the mean of its divisors is an integer number (5892264).

Almost surely, 2^23132539 is an apocalyptic number.

23132539 is a deficient number, since it is larger than the sum of its proper divisors (436517).

23132539 is an equidigital number, since it uses as much as digits as its factorization.

23132539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436516.

The product of its digits is 4860, while the sum is 28.

The square root of 23132539 is about 4809.6298194352. The cubic root of 23132539 is about 284.9319176658.

The spelling of 23132539 in words is "twenty-three million, one hundred thirty-two thousand, five hundred thirty-nine".