23225521 has 4 divisors (see below), whose sum is σ = 25336944. Its totient is φ = 21114100.

The previous prime is 23225509. The next prime is 23225533. The reversal of 23225521 is 12552232.

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 an interprime number because it is at equal distance from previous prime (23225509) and next prime (23225533).

It is a cyclic number.

It is not a de Polignac number, because 23225521 - 2¹⁵ = 23192753 is a prime.

It is a pancake number, because a pancake can be divided into 23225521 parts by 6815 straight cuts.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23225492 and 23225501.

It is not an unprimeable number, because it can be changed into a prime (23225551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055695 + ... + 1055716.

It is an arithmetic number, because the mean of its divisors is an integer number (6334236).

Almost surely, 2^23225521 is an apocalyptic number.

It is an amenable number.

23225521 is a deficient number, since it is larger than the sum of its proper divisors (2111423).

23225521 is a wasteful number, since it uses less digits than its factorization.

23225521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111422.

The product of its digits is 1200, while the sum is 22.

The square root of 23225521 is about 4819.2863579580. The cubic root of 23225521 is about 285.3131716995.

Adding to 23225521 its reverse (12552232), we get a palindrome (35777753).

Subtracting from 23225521 its reverse (12552232), we obtain a square (10673289 = 3267²).

The spelling of 23225521 in words is "twenty-three million, two hundred twenty-five thousand, five hundred twenty-one".