23152621 has 4 divisors (see below), whose sum is σ = 24371200. Its totient is φ = 21934044.

The previous prime is 23152543. The next prime is 23152631. The reversal of 23152621 is 12625132.

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 not a de Polignac number, because 23152621 - 2⁹ = 23152109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23152592 and 23152601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23152631) 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, 609261 + ... + 609298.

It is an arithmetic number, because the mean of its divisors is an integer number (6092800).

Almost surely, 2^23152621 is an apocalyptic number.

It is an amenable number.

23152621 is a deficient number, since it is larger than the sum of its proper divisors (1218579).

23152621 is a wasteful number, since it uses less digits than its factorization.

23152621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218578.

The product of its digits is 720, while the sum is 22.

The square root of 23152621 is about 4811.7170531942. The cubic root of 23152621 is about 285.0143462564.

Adding to 23152621 its reverse (12625132), we get a palindrome (35777753).

The spelling of 23152621 in words is "twenty-three million, one hundred fifty-two thousand, six hundred twenty-one".