225142561 has 8 divisors (see below), whose sum is σ = 268493184. Its totient is φ = 184588800.

The previous prime is 225142523. The next prime is 225142583. The reversal of 225142561 is 165241522.

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

It is not a de Polignac number, because 225142561 - 2¹⁵ = 225109793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225142501) 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, 699040 + ... + 699361.

It is an arithmetic number, because the mean of its divisors is an integer number (33561648).

Almost surely, 2^225142561 is an apocalyptic number.

It is an amenable number.

225142561 is a deficient number, since it is larger than the sum of its proper divisors (43350623).

225142561 is a wasteful number, since it uses less digits than its factorization.

225142561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398431.

The product of its digits is 4800, while the sum is 28.

The square root of 225142561 is about 15004.7512808443. The cubic root of 225142561 is about 608.3486294438.

The spelling of 225142561 in words is "two hundred twenty-five million, one hundred forty-two thousand, five hundred sixty-one".