23220525 has 24 divisors (see below), whose sum is σ = 38972704. Its totient is φ = 12196800.

The previous prime is 23220499. The next prime is 23220529. The reversal of 23220525 is 52502232.

It is not a de Polignac number, because 23220525 - 2¹² = 23216429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220529) 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 23 ways as a sum of consecutive naturals, for example, 2715 + ... + 7335.

Almost surely, 2^23220525 is an apocalyptic number.

23220525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23220525 is a deficient number, since it is larger than the sum of its proper divisors (15752179).

23220525 is a wasteful number, since it uses less digits than its factorization.

23220525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701 (or 4696 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 23220525 is about 4818.7679960753. The cubic root of 23220525 is about 285.2927124982.

Adding to 23220525 its reverse (52502232), we get a palindrome (75722757).

The spelling of 23220525 in words is "twenty-three million, two hundred twenty thousand, five hundred twenty-five".