225143161 has 2 divisors, whose sum is σ = 225143162. Its totient is φ = 225143160.

The previous prime is 225143147. The next prime is 225143183. The reversal of 225143161 is 161341522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221414400 + 3728761 = 14880^2 + 1931^2 .

It is a cyclic number.

It is not a de Polignac number, because 225143161 - 2⁵ = 225143129 is a prime.

It is not a weakly prime, because it can be changed into another prime (225143561) 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 as a sum of consecutive naturals, namely, 112571580 + 112571581.

It is an arithmetic number, because the mean of its divisors is an integer number (112571581).

Almost surely, 2^225143161 is an apocalyptic number.

It is an amenable number.

225143161 is a deficient number, since it is larger than the sum of its proper divisors (1).

225143161 is an equidigital number, since it uses as much as digits as its factorization.

225143161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 225143161 is about 15004.7712744980. The cubic root of 225143161 is about 608.3491698552.

Adding to 225143161 its reverse (161341522), we get a palindrome (386484683).

The spelling of 225143161 in words is "two hundred twenty-five million, one hundred forty-three thousand, one hundred sixty-one".