143640226 has 8 divisors (see below), whose sum is σ = 215693100. Its totient is φ = 71742528.

The previous prime is 143640223. The next prime is 143640227. The reversal of 143640226 is 622046341.

It is a Cunningham number, because it is equal to 11985²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 143640225 + 1 = 11985^2 + 1^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 143640194 and 143640203.

It is not an unprimeable number, because it can be changed into a prime (143640223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36451 + ... + 40198.

Almost surely, 2^143640226 is an apocalyptic number.

143640226 is a deficient number, since it is larger than the sum of its proper divisors (72052874).

143640226 is an equidigital number, since it uses as much as digits as its factorization.

143640226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77588.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 143640226 is about 11985.0000417188. Note that the first 4 decimals coincide. The cubic root of 143640226 is about 523.7113987762.

Adding to 143640226 its reverse (622046341), we get a palindrome (765686567).

The spelling of 143640226 in words is "one hundred forty-three million, six hundred forty thousand, two hundred twenty-six".