225681143 has 2 divisors, whose sum is σ = 225681144. Its totient is φ = 225681142.

The previous prime is 225681139. The next prime is 225681163. The reversal of 225681143 is 341186522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225681143 - 2² = 225681139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225681163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112840571 + 112840572.

It is an arithmetic number, because the mean of its divisors is an integer number (112840572).

Almost surely, 2^225681143 is an apocalyptic number.

225681143 is a deficient number, since it is larger than the sum of its proper divisors (1).

225681143 is an equidigital number, since it uses as much as digits as its factorization.

225681143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 225681143 is about 15022.6876090798. The cubic root of 225681143 is about 608.8333367097.

The spelling of 225681143 in words is "two hundred twenty-five million, six hundred eighty-one thousand, one hundred forty-three".