22131425 has 6 divisors (see below), whose sum is σ = 27442998. Its totient is φ = 17705120.

The previous prime is 22131397. The next prime is 22131443. The reversal of 22131425 is 52413122.

It can be written as a sum of positive squares in 3 ways, for example, as 5058001 + 17073424 = 2249^2 + 4132^2 .

It is not a de Polignac number, because 22131425 - 2¹⁰ = 22130401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22131397 and 22131406.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 442604 + ... + 442653.

It is an arithmetic number, because the mean of its divisors is an integer number (4573833).

Almost surely, 2^22131425 is an apocalyptic number.

22131425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22131425 is a deficient number, since it is larger than the sum of its proper divisors (5311573).

22131425 is an equidigital number, since it uses as much as digits as its factorization.

22131425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885267 (or 885262 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 22131425 is about 4704.4048507755. The cubic root of 22131425 is about 280.7607923615.

Adding to 22131425 its reverse (52413122), we get a palindrome (74544547).

The spelling of 22131425 in words is "twenty-two million, one hundred thirty-one thousand, four hundred twenty-five".