203431023 has 12 divisors (see below), whose sum is σ = 295718488. Its totient is φ = 134755920.

The previous prime is 203431003. The next prime is 203431031. The reversal of 203431023 is 320134302.

It is not a de Polignac number, because 203431023 - 2⁵ = 203430991 is a prime.

It is a super-2 number, since 2×203431023² = 82768362237653058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203430987 and 203431005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203431003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70573 + ... + 73398.

Almost surely, 2^203431023 is an apocalyptic number.

203431023 is a deficient number, since it is larger than the sum of its proper divisors (92287465).

203431023 is a wasteful number, since it uses less digits than its factorization.

203431023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144134 (or 144131 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 203431023 is about 14262.9247701865. The cubic root of 203431023 is about 588.1287289308.

Adding to 203431023 its reverse (320134302), we get a palindrome (523565325).

The spelling of 203431023 in words is "two hundred three million, four hundred thirty-one thousand, twenty-three".