225736129 has 4 divisors (see below), whose sum is σ = 228272580. Its totient is φ = 223199680.

The previous prime is 225736117. The next prime is 225736151. The reversal of 225736129 is 921637522.

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 114918400 + 110817729 = 10720^2 + 10527^2 .

It is a cyclic number.

It is not a de Polignac number, because 225736129 - 2¹⁹ = 225211841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225736429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1268092 + ... + 1268269.

It is an arithmetic number, because the mean of its divisors is an integer number (57068145).

Almost surely, 2^225736129 is an apocalyptic number.

It is an amenable number.

225736129 is a deficient number, since it is larger than the sum of its proper divisors (2536451).

225736129 is an equidigital number, since it uses as much as digits as its factorization.

225736129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536450.

The product of its digits is 45360, while the sum is 37.

The square root of 225736129 is about 15024.5175962491. The cubic root of 225736129 is about 608.8827790201.

The spelling of 225736129 in words is "two hundred twenty-five million, seven hundred thirty-six thousand, one hundred twenty-nine".