23221825 has 12 divisors (see below), whose sum is σ = 31413168. Its totient is φ = 16888400.

The previous prime is 23221817. The next prime is 23221841. The reversal of 23221825 is 52812232.

It is not a de Polignac number, because 23221825 - 2³ = 23221817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23221825.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41947 + ... + 42496.

It is an arithmetic number, because the mean of its divisors is an integer number (2617764).

Almost surely, 2^23221825 is an apocalyptic number.

23221825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23221825 is a deficient number, since it is larger than the sum of its proper divisors (8191343).

23221825 is a wasteful number, since it uses less digits than its factorization.

23221825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84464 (or 84459 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 23221825 is about 4818.9028834373. The cubic root of 23221825 is about 285.2980364319.

The spelling of 23221825 in words is "twenty-three million, two hundred twenty-one thousand, eight hundred twenty-five".