225720106225 has 6 divisors (see below), whose sum is σ = 279892931750. Its totient is φ = 180576084960.

The previous prime is 225720106223. The next prime is 225720106277. The reversal of 225720106225 is 522601027522.

It can be written as a sum of positive squares in 3 ways, for example, as 559417104 + 225160689121 = 23652^2 + 474511^2 .

It is not a de Polignac number, because 225720106225 - 2¹ = 225720106223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225720106223) 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, 4514402100 + ... + 4514402149.

Almost surely, 2^225720106225 is an apocalyptic number.

225720106225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225720106225 is a deficient number, since it is larger than the sum of its proper divisors (54172825525).

225720106225 is an equidigital number, since it uses as much as digits as its factorization.

225720106225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9028804259 (or 9028804254 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 225720106225 in words is "two hundred twenty-five billion, seven hundred twenty million, one hundred six thousand, two hundred twenty-five".