225204045 has 32 divisors (see below), whose sum is σ = 394260480. Its totient is φ = 108863040.

The previous prime is 225204013. The next prime is 225204071. The reversal of 225204045 is 540402522.

It is a happy number.

It is not a de Polignac number, because 225204045 - 2⁵ = 225204013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58696 + ... + 62414.

It is an arithmetic number, because the mean of its divisors is an integer number (12320640).

Almost surely, 2^225204045 is an apocalyptic number.

It is an amenable number.

225204045 is a deficient number, since it is larger than the sum of its proper divisors (169056435).

225204045 is a wasteful number, since it uses less digits than its factorization.

225204045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4105.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 225204045 is about 15006.7999586854. The cubic root of 225204045 is about 608.4040022154.

Adding to 225204045 its reverse (540402522), we get a palindrome (765606567).

It can be divided in two parts, 22520 and 4045, that added together give a triangular number (26565 = T₂₃₀).

The spelling of 225204045 in words is "two hundred twenty-five million, two hundred four thousand, forty-five".