225760861 has 4 divisors (see below), whose sum is σ = 226366492. Its totient is φ = 225155232.

The previous prime is 225760837. The next prime is 225760877. The reversal of 225760861 is 168067522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172922500 + 52838361 = 13150^2 + 7269^2 .

It is a cyclic number.

It is not a de Polignac number, because 225760861 - 2²¹ = 223663709 is a prime.

It is a super-2 number, since 2×225760861² = 101935932718922642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225760861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225760891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302256 + ... + 303001.

It is an arithmetic number, because the mean of its divisors is an integer number (56591623).

Almost surely, 2^225760861 is an apocalyptic number.

It is an amenable number.

225760861 is a deficient number, since it is larger than the sum of its proper divisors (605631).

225760861 is an equidigital number, since it uses as much as digits as its factorization.

225760861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605630.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 225760861 is about 15025.3406284184. The cubic root of 225760861 is about 608.9050149216.

The spelling of 225760861 in words is "two hundred twenty-five million, seven hundred sixty thousand, eight hundred sixty-one".