22545023225 has 6 divisors (see below), whose sum is σ = 27955828830. Its totient is φ = 18036018560.

The previous prime is 22545023209. The next prime is 22545023243. The reversal of 22545023225 is 52232054522.

It can be written as a sum of positive squares in 3 ways, for example, as 7723421689 + 14821601536 = 87883^2 + 121744^2 .

It is not a de Polignac number, because 22545023225 - 2⁴ = 22545023209 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22545023191 and 22545023200.

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, 450900440 + ... + 450900489.

It is an arithmetic number, because the mean of its divisors is an integer number (4659304805).

Almost surely, 2^22545023225 is an apocalyptic number.

22545023225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22545023225 is a deficient number, since it is larger than the sum of its proper divisors (5410805605).

22545023225 is an equidigital number, since it uses as much as digits as its factorization.

22545023225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901800939 (or 901800934 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 32.

Adding to 22545023225 its reverse (52232054522), we get a palindrome (74777077747).

The spelling of 22545023225 in words is "twenty-two billion, five hundred forty-five million, twenty-three thousand, two hundred twenty-five".