22520215225 has 6 divisors (see below), whose sum is σ = 27925066910. Its totient is φ = 18016172160.

The previous prime is 22520215189. The next prime is 22520215241. The reversal of 22520215225 is 52251202522.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5812921 + 22514402304 = 2411^2 + 150048^2 .

It is not a de Polignac number, because 22520215225 - 2⁹ = 22520214713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22520215193 and 22520215202.

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, 450404280 + ... + 450404329.

Almost surely, 2^22520215225 is an apocalyptic number.

22520215225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22520215225 is a deficient number, since it is larger than the sum of its proper divisors (5404851685).

22520215225 is an equidigital number, since it uses as much as digits as its factorization.

22520215225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900808619 (or 900808614 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 22520215225 its reverse (52251202522), we get a palindrome (74771417747).

The spelling of 22520215225 in words is "twenty-two billion, five hundred twenty million, two hundred fifteen thousand, two hundred twenty-five".