225405045 has 32 divisors (see below), whose sum is σ = 401731200. Its totient is φ = 119912832.

The previous prime is 225405043. The next prime is 225405071. The reversal of 225405045 is 540504522.

It is not a de Polignac number, because 225405045 - 2¹ = 225405043 is a prime.

It is a super-2 number, since 2×225405045² = 101614868622904050, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225405043) 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 31 ways as a sum of consecutive naturals, for example, 57921 + ... + 61689.

It is an arithmetic number, because the mean of its divisors is an integer number (12554100).

Almost surely, 2^225405045 is an apocalyptic number.

It is an amenable number.

225405045 is a deficient number, since it is larger than the sum of its proper divisors (176326155).

225405045 is a wasteful number, since it uses less digits than its factorization.

225405045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4226 (or 4220 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 225405045 is about 15013.4954291131. The cubic root of 225405045 is about 608.5849534359.

Adding to 225405045 its reverse (540504522), we get a palindrome (765909567).

The spelling of 225405045 in words is "two hundred twenty-five million, four hundred five thousand, forty-five".