203401431 has 12 divisors (see below), whose sum is σ = 294477040. Its totient is φ = 135289440.

The previous prime is 203401427. The next prime is 203401483. The reversal of 203401431 is 134104302.

It is not a de Polignac number, because 203401431 - 2² = 203401427 is a prime.

It is a super-2 number, since 2×203401431² = 82744284265695522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203401411) 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, 21790 + ... + 29691.

Almost surely, 2^203401431 is an apocalyptic number.

203401431 is a deficient number, since it is larger than the sum of its proper divisors (91075609).

203401431 is a wasteful number, since it uses less digits than its factorization.

203401431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51926 (or 51923 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 203401431 is about 14261.8873575695. The cubic root of 203401431 is about 588.1002102565.

Adding to 203401431 its reverse (134104302), we get a palindrome (337505733).

The spelling of 203401431 in words is "two hundred three million, four hundred one thousand, four hundred thirty-one".