225722409 has 8 divisors (see below), whose sum is σ = 328323552. Its totient is φ = 136801440.

The previous prime is 225722383. The next prime is 225722411. The reversal of 225722409 is 904227522.

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

It is not a de Polignac number, because 225722409 - 2¹⁹ = 225198121 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 6840073 = 225722409 / (2 + 2 + 5 + 7 + 2 + 2 + 4 + 0 + 9).

It is a self number, because there is not a number n which added to its sum of digits gives 225722409.

It is not an unprimeable number, because it can be changed into a prime (225722429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3420004 + ... + 3420069.

It is an arithmetic number, because the mean of its divisors is an integer number (41040444).

Almost surely, 2^225722409 is an apocalyptic number.

It is an amenable number.

225722409 is a deficient number, since it is larger than the sum of its proper divisors (102601143).

225722409 is a wasteful number, since it uses less digits than its factorization.

225722409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6840087.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 225722409 is about 15024.0610022723. The cubic root of 225722409 is about 608.8704430226.

The spelling of 225722409 in words is "two hundred twenty-five million, seven hundred twenty-two thousand, four hundred nine".