143431603 has 4 divisors (see below), whose sum is σ = 163921840. Its totient is φ = 122941368.

The previous prime is 143431597. The next prime is 143431609. The reversal of 143431603 is 306134341.

It is a happy number.

143431603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 306134341 = 1103 ⋅277547.

It is an interprime number because it is at equal distance from previous prime (143431597) and next prime (143431609).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143431603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143431609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10245108 + ... + 10245121.

It is an arithmetic number, because the mean of its divisors is an integer number (40980460).

Almost surely, 2^143431603 is an apocalyptic number.

143431603 is a deficient number, since it is larger than the sum of its proper divisors (20490237).

143431603 is an equidigital number, since it uses as much as digits as its factorization.

143431603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20490236.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 143431603 is about 11976.2933748301. The cubic root of 143431603 is about 523.4577298599.

Adding to 143431603 its reverse (306134341), we get a palindrome (449565944).

The spelling of 143431603 in words is "one hundred forty-three million, four hundred thirty-one thousand, six hundred three".