203422143 has 16 divisors (see below), whose sum is σ = 283956480. Its totient is φ = 129290304.

The previous prime is 203422139. The next prime is 203422159. The reversal of 203422143 is 341224302.

It is not a de Polignac number, because 203422143 - 2² = 203422139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203422103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16888 + ... + 26306.

It is an arithmetic number, because the mean of its divisors is an integer number (17747280).

Almost surely, 2^203422143 is an apocalyptic number.

203422143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

203422143 is a deficient number, since it is larger than the sum of its proper divisors (80534337).

203422143 is a wasteful number, since it uses less digits than its factorization.

203422143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9758.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 203422143 is about 14262.6134701884. The cubic root of 203422143 is about 588.1201713060.

Adding to 203422143 its reverse (341224302), we get a palindrome (544646445).

The spelling of 203422143 in words is "two hundred three million, four hundred twenty-two thousand, one hundred forty-three".