2225212525 has 6 divisors (see below), whose sum is σ = 2759263562. Its totient is φ = 1780170000.

The previous prime is 2225212511. The next prime is 2225212529. The reversal of 2225212525 is 5252125222.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 8874441 + 2216338084 = 2979^2 + 47078^2 .

It is not a de Polignac number, because 2225212525 - 2⁹ = 2225212013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2225212493 and 2225212502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2225212529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44504226 + ... + 44504275.

Almost surely, 2^2225212525 is an apocalyptic number.

2225212525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2225212525 is a deficient number, since it is larger than the sum of its proper divisors (534051037).

2225212525 is an equidigital number, since it uses as much as digits as its factorization.

2225212525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89008511 (or 89008506 counting only the distinct ones).

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

The square root of 2225212525 is about 47172.1583669859. The cubic root of 2225212525 is about 1305.5409500168.

Adding to 2225212525 its reverse (5252125222), we get a palindrome (7477337747).

The spelling of 2225212525 in words is "two billion, two hundred twenty-five million, two hundred twelve thousand, five hundred twenty-five".