225575409 has 8 divisors (see below), whose sum is σ = 300868992. Its totient is φ = 150332720.

The previous prime is 225575407. The next prime is 225575479. The reversal of 225575409 is 904575522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225575409 - 2¹ = 225575407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225575401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 777 + ... + 21254.

It is an arithmetic number, because the mean of its divisors is an integer number (37608624).

Almost surely, 2^225575409 is an apocalyptic number.

It is an amenable number.

225575409 is a deficient number, since it is larger than the sum of its proper divisors (75293583).

225575409 is a wasteful number, since it uses less digits than its factorization.

225575409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25447.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 225575409 is about 15019.1680528583. The cubic root of 225575409 is about 608.7382402399.

It can be divided in two parts, 22557 and 5409, that added together give a triangular number (27966 = T₂₃₆).

The spelling of 225575409 in words is "two hundred twenty-five million, five hundred seventy-five thousand, four hundred nine".