225229690261 has 4 divisors (see below), whose sum is σ = 225300498124. Its totient is φ = 225158882400.

The previous prime is 225229690207. The next prime is 225229690271. The reversal of 225229690261 is 162096922522.

It is a happy number.

225229690261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38060108100 + 187169582161 = 195090^2 + 432631^2 .

It is a cyclic number.

It is not a de Polignac number, because 225229690261 - 2²³ = 225221301653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225229690201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35399160 + ... + 35405521.

It is an arithmetic number, because the mean of its divisors is an integer number (56325124531).

Almost surely, 2^225229690261 is an apocalyptic number.

It is an amenable number.

225229690261 is a deficient number, since it is larger than the sum of its proper divisors (70807863).

225229690261 is an equidigital number, since it uses as much as digits as its factorization.

225229690261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70807862.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 225229690261 in words is "two hundred twenty-five billion, two hundred twenty-nine million, six hundred ninety thousand, two hundred sixty-one".