225787829 has 4 divisors (see below), whose sum is σ = 239069484. Its totient is φ = 212506176.

The previous prime is 225787777. The next prime is 225787873. The reversal of 225787829 is 928787522.

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 101465329 + 124322500 = 10073^2 + 11150^2 .

It is a cyclic number.

It is not a de Polignac number, because 225787829 - 2¹⁶ = 225722293 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 (225787879) 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, 6640802 + ... + 6640835.

It is an arithmetic number, because the mean of its divisors is an integer number (59767371).

Almost surely, 2^225787829 is an apocalyptic number.

It is an amenable number.

225787829 is a deficient number, since it is larger than the sum of its proper divisors (13281655).

225787829 is a wasteful number, since it uses less digits than its factorization.

225787829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13281654.

The product of its digits is 1128960, while the sum is 50.

The square root of 225787829 is about 15026.2380188788. The cubic root of 225787829 is about 608.9292593020.

The spelling of 225787829 in words is "two hundred twenty-five million, seven hundred eighty-seven thousand, eight hundred twenty-nine".