23501225 has 36 divisors (see below), whose sum is σ = 33990012. Its totient is φ = 16051200.

The previous prime is 23501171. The next prime is 23501243. The reversal of 23501225 is 52210532.

It can be written as a sum of positive squares in 6 ways, for example, as 1024144 + 22477081 = 1012^2 + 4741^2 .

It is not a de Polignac number, because 23501225 - 2⁶ = 23501161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23501197 and 23501206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51197 + ... + 51653.

It is an arithmetic number, because the mean of its divisors is an integer number (944167).

Almost surely, 2^23501225 is an apocalyptic number.

23501225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23501225 is a deficient number, since it is larger than the sum of its proper divisors (10488787).

23501225 is a wasteful number, since it uses less digits than its factorization.

23501225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 23501225 is about 4847.8062048725. The cubic root of 23501225 is about 286.4376927350.

Adding to 23501225 its reverse (52210532), we get a palindrome (75711757).

The spelling of 23501225 in words is "twenty-three million, five hundred one thousand, two hundred twenty-five".