22431425 has 12 divisors (see below), whose sum is σ = 27965100. Its totient is φ = 17848320.

The previous prime is 22431391. The next prime is 22431427. The reversal of 22431425 is 52413422.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 39601 + 22391824 = 199^2 + 4732^2 .

It is not a de Polignac number, because 22431425 - 2⁸ = 22431169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22431425.

It is not an unprimeable number, because it can be changed into a prime (22431427) 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 11 ways as a sum of consecutive naturals, for example, 2501 + ... + 7149.

It is an arithmetic number, because the mean of its divisors is an integer number (2330425).

Almost surely, 2^22431425 is an apocalyptic number.

22431425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22431425 is a deficient number, since it is larger than the sum of its proper divisors (5533675).

22431425 is a wasteful number, since it uses less digits than its factorization.

22431425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4852 (or 4847 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 22431425 is about 4736.1825344891. The cubic root of 22431425 is about 282.0237099257.

Adding to 22431425 its reverse (52413422), we get a palindrome (74844847).

The spelling of 22431425 in words is "twenty-two million, four hundred thirty-one thousand, four hundred twenty-five".