23232509 has 8 divisors (see below), whose sum is σ = 24099960. Its totient is φ = 22369536.

The previous prime is 23232499. The next prime is 23232529. The reversal of 23232509 is 90523232.

It can be written as a sum of positive squares in 4 ways, for example, as 2044900 + 21187609 = 1430^2 + 4603^2 .

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 23232509 - 2⁴ = 23232493 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23232529) 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, 12377 + ... + 14129.

It is an arithmetic number, because the mean of its divisors is an integer number (3012495).

Almost surely, 2^23232509 is an apocalyptic number.

23232509 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

23232509 is a deficient number, since it is larger than the sum of its proper divisors (867451).

23232509 is a wasteful number, since it uses less digits than its factorization.

23232509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 23232509 is about 4820.0113070407. The cubic root of 23232509 is about 285.3417834511.

The spelling of 23232509 in words is "twenty-three million, two hundred thirty-two thousand, five hundred nine".