225253561 has 8 divisors (see below), whose sum is σ = 243528264. Its totient is φ = 207114240.

The previous prime is 225253547. The next prime is 225253573. The reversal of 225253561 is 165352522.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 68227600 + 157025961 = 8260^2 + 12531^2 .

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 225253561 - 2¹⁷ = 225122489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225253661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30370 + ... + 37051.

It is an arithmetic number, because the mean of its divisors is an integer number (30441033).

Almost surely, 2^225253561 is an apocalyptic number.

It is an amenable number.

225253561 is a deficient number, since it is larger than the sum of its proper divisors (18274703).

225253561 is a wasteful number, since it uses less digits than its factorization.

225253561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67691.

The product of its digits is 18000, while the sum is 31.

The square root of 225253561 is about 15008.4496534452. The cubic root of 225253561 is about 608.4485892252.

The spelling of 225253561 in words is "two hundred twenty-five million, two hundred fifty-three thousand, five hundred sixty-one".