22231825 has 24 divisors (see below), whose sum is σ = 34372800. Its totient is φ = 13857600.

The previous prime is 22231789. The next prime is 22231861. The reversal of 22231825 is 52813222.

It is an interprime number because it is at equal distance from previous prime (22231789) and next prime (22231861).

It is not a de Polignac number, because 22231825 - 2¹³ = 22223633 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22231825.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3850 + ... + 7699.

It is an arithmetic number, because the mean of its divisors is an integer number (1432200).

Almost surely, 2^22231825 is an apocalyptic number.

22231825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22231825 is the 3850-th pentagonal number.

It is an amenable number.

22231825 is a deficient number, since it is larger than the sum of its proper divisors (12140975).

22231825 is a wasteful number, since it uses less digits than its factorization.

22231825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11577 (or 11572 counting only the distinct ones).

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

The square root of 22231825 is about 4715.0636262939. The cubic root of 22231825 is about 281.1847124177.

The spelling of 22231825 in words is "twenty-two million, two hundred thirty-one thousand, eight hundred twenty-five".