23245520 has 40 divisors (see below), whose sum is σ = 54329856. Its totient is φ = 9249408.

The previous prime is 23245517. The next prime is 23245529. The reversal of 23245520 is 2554232.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23245529) 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 7 ways as a sum of consecutive naturals, for example, 17189 + ... + 18491.

Almost surely, 2^23245520 is an apocalyptic number.

23245520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23245520 is an abundant number, since it is smaller than the sum of its proper divisors (31084336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23245520 is a wasteful number, since it uses less digits than its factorization.

23245520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539 (or 1533 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 23245520 is about 4821.3608037565. The cubic root of 23245520 is about 285.3950405646.

Adding to 23245520 its reverse (2554232), we get a palindrome (25799752).

The spelling of 23245520 in words is "twenty-three million, two hundred forty-five thousand, five hundred twenty".