225640361 has 4 divisors (see below), whose sum is σ = 225681924. Its totient is φ = 225598800.

The previous prime is 225640309. The next prime is 225640369. The reversal of 225640361 is 163046522.

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 77774761 + 147865600 = 8819^2 + 12160^2 .

It is a cyclic number.

It is not a de Polignac number, because 225640361 - 2¹⁴ = 225623977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225640369) 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, 11150 + ... + 23991.

It is an arithmetic number, because the mean of its divisors is an integer number (56420481).

Almost surely, 2^225640361 is an apocalyptic number.

It is an amenable number.

225640361 is a deficient number, since it is larger than the sum of its proper divisors (41563).

225640361 is an equidigital number, since it uses as much as digits as its factorization.

225640361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41562.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 225640361 is about 15021.3302007512. The cubic root of 225640361 is about 608.7966611645.

Adding to 225640361 its reverse (163046522), we get a palindrome (388686883).

The spelling of 225640361 in words is "two hundred twenty-five million, six hundred forty thousand, three hundred sixty-one".