225154409 has 6 divisors (see below), whose sum is σ = 239178174. Its totient is φ = 211909760.

The previous prime is 225154399. The next prime is 225154451. The reversal of 225154409 is 904451522.

It can be written as a sum of positive squares in 3 ways, for example, as 148766809 + 76387600 = 12197^2 + 8740^2 .

It is a de Polignac number, because none of the positive numbers 2^k-225154409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225154309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 389252 + ... + 389829.

It is an arithmetic number, because the mean of its divisors is an integer number (39863029).

Almost surely, 2^225154409 is an apocalyptic number.

It is an amenable number.

225154409 is a deficient number, since it is larger than the sum of its proper divisors (14023765).

225154409 is an equidigital number, since it uses as much as digits as its factorization.

225154409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779115 (or 779098 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 225154409 is about 15005.1460839273. The cubic root of 225154409 is about 608.3593005908.

The spelling of 225154409 in words is "two hundred twenty-five million, one hundred fifty-four thousand, four hundred nine".