227640143 has 2 divisors, whose sum is σ = 227640144. Its totient is φ = 227640142.

The previous prime is 227640139. The next prime is 227640181. The reversal of 227640143 is 341046722.

227640143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 227640143 - 2² = 227640139 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227640043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113820071 + 113820072.

It is an arithmetic number, because the mean of its divisors is an integer number (113820072).

Almost surely, 2^227640143 is an apocalyptic number.

227640143 is a deficient number, since it is larger than the sum of its proper divisors (1).

227640143 is an equidigital number, since it uses as much as digits as its factorization.

227640143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 227640143 is about 15087.7481089790. The cubic root of 227640143 is about 610.5899005522.

Adding to 227640143 its reverse (341046722), we get a palindrome (568686865).

The spelling of 227640143 in words is "two hundred twenty-seven million, six hundred forty thousand, one hundred forty-three".