225689505 has 32 divisors (see below), whose sum is σ = 381680640. Its totient is φ = 113561280.

The previous prime is 225689489. The next prime is 225689507. The reversal of 225689505 is 505986522.

It is not a de Polignac number, because 225689505 - 2⁴ = 225689489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225689507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73450 + ... + 76460.

It is an arithmetic number, because the mean of its divisors is an integer number (11927520).

Almost surely, 2^225689505 is an apocalyptic number.

It is an amenable number.

225689505 is a deficient number, since it is larger than the sum of its proper divisors (155991135).

225689505 is a wasteful number, since it uses less digits than its factorization.

225689505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301.

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 225689505 is about 15022.9659188857. The cubic root of 225689505 is about 608.8408561704.

The spelling of 225689505 in words is "two hundred twenty-five million, six hundred eighty-nine thousand, five hundred five".