20243225 has 6 divisors (see below), whose sum is σ = 25101630. Its totient is φ = 16194560.

The previous prime is 20243219. The next prime is 20243233. The reversal of 20243225 is 52234202.

It can be written as a sum of positive squares in 3 ways, for example, as 2569609 + 17673616 = 1603^2 + 4204^2 .

It is not a de Polignac number, because 20243225 - 2⁶ = 20243161 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20243197 and 20243206.

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, 404840 + ... + 404889.

It is an arithmetic number, because the mean of its divisors is an integer number (4183605).

Almost surely, 2^20243225 is an apocalyptic number.

20243225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20243225 is a deficient number, since it is larger than the sum of its proper divisors (4858405).

20243225 is an equidigital number, since it uses as much as digits as its factorization.

20243225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809739 (or 809734 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20243225 is about 4499.2471592479. The cubic root of 20243225 is about 272.5376880230.

Adding to 20243225 its reverse (52234202), we get a palindrome (72477427).

The spelling of 20243225 in words is "twenty million, two hundred forty-three thousand, two hundred twenty-five".