23132621 has 4 divisors (see below), whose sum is σ = 23477952. Its totient is φ = 22787292.

The previous prime is 23132591. The next prime is 23132623. The reversal of 23132621 is 12623132.

It is a happy number.

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-23132621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23132593 and 23132602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23132623) 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, 172565 + ... + 172698.

It is an arithmetic number, because the mean of its divisors is an integer number (5869488).

Almost surely, 2^23132621 is an apocalyptic number.

It is an amenable number.

23132621 is a deficient number, since it is larger than the sum of its proper divisors (345331).

23132621 is an equidigital number, since it uses as much as digits as its factorization.

23132621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345330.

The product of its digits is 432, while the sum is 20.

The square root of 23132621 is about 4809.6383439922. The cubic root of 23132621 is about 284.9322543400.

Adding to 23132621 its reverse (12623132), we get a palindrome (35755753).

The spelling of 23132621 in words is "twenty-three million, one hundred thirty-two thousand, six hundred twenty-one".