225555005 has 16 divisors (see below), whose sum is σ = 293225520. Its totient is φ = 166555584.

The previous prime is 225554983. The next prime is 225555079. The reversal of 225555005 is 500555522.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 150160516 + 75394489 = 12254^2 + 8683^2 .

It is not a de Polignac number, because 225555005 - 2⁶ = 225554941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719 + ... + 21251.

It is an arithmetic number, because the mean of its divisors is an integer number (18326595).

Almost surely, 2^225555005 is an apocalyptic number.

It is an amenable number.

225555005 is a deficient number, since it is larger than the sum of its proper divisors (67670515).

225555005 is an equidigital number, since it uses as much as digits as its factorization.

225555005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20577 (or 20551 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 29.

The square root of 225555005 is about 15018.4887721768. The cubic root of 225555005 is about 608.7198855950.

The spelling of 225555005 in words is "two hundred twenty-five million, five hundred fifty-five thousand, five".