225530811 has 30 divisors (see below), whose sum is σ = 370332116. Its totient is φ = 136679400.

The previous prime is 225530783. The next prime is 225530813. The reversal of 225530811 is 118035522.

It is a happy number.

It is not a de Polignac number, because 225530811 - 2¹¹ = 225528763 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (225530813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1705 + ... + 21306.

Almost surely, 2^225530811 is an apocalyptic number.

225530811 is a deficient number, since it is larger than the sum of its proper divisors (144801305).

225530811 is a wasteful number, since it uses less digits than its factorization.

225530811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23045 (or 23025 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 225530811 is about 15017.6832767241. The cubic root of 225530811 is about 608.6981201791.

The spelling of 225530811 in words is "two hundred twenty-five million, five hundred thirty thousand, eight hundred eleven".