203424123 has 32 divisors (see below), whose sum is σ = 317799936. Its totient is φ = 113338368.

The previous prime is 203424103. The next prime is 203424173. The reversal of 203424123 is 321424302.

It is not a de Polignac number, because 203424123 - 2¹⁸ = 203161979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 203424123.

It is not an unprimeable number, because it can be changed into a prime (203424103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214336 + ... + 215282.

It is an arithmetic number, because the mean of its divisors is an integer number (9931248).

Almost surely, 2^203424123 is an apocalyptic number.

203424123 is a deficient number, since it is larger than the sum of its proper divisors (114375813).

203424123 is a wasteful number, since it uses less digits than its factorization.

203424123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203.

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

The square root of 203424123 is about 14262.6828822631. The cubic root of 203424123 is about 588.1220794466.

Adding to 203424123 its reverse (321424302), we get a palindrome (524848425).

The spelling of 203424123 in words is "two hundred three million, four hundred twenty-four thousand, one hundred twenty-three".