22290425 has 6 divisors (see below), whose sum is σ = 27640158. Its totient is φ = 17832320.

The previous prime is 22290419. The next prime is 22290449. The reversal of 22290425 is 52409222.

It can be written as a sum of positive squares in 3 ways, for example, as 565504 + 21724921 = 752^2 + 4661^2 .

It is not a de Polignac number, because 22290425 - 2⁴ = 22290409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22290394 and 22290403.

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, 445784 + ... + 445833.

It is an arithmetic number, because the mean of its divisors is an integer number (4606693).

Almost surely, 2^22290425 is an apocalyptic number.

22290425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22290425 is a deficient number, since it is larger than the sum of its proper divisors (5349733).

22290425 is an equidigital number, since it uses as much as digits as its factorization.

22290425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891627 (or 891622 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 22290425 is about 4721.2736629007. The cubic root of 22290425 is about 281.4315502716.

Adding to 22290425 its reverse (52409222), we get a palindrome (74699647).

The spelling of 22290425 in words is "twenty-two million, two hundred ninety thousand, four hundred twenty-five".