203431361 has 4 divisors (see below), whose sum is σ = 232492992. Its totient is φ = 174369732.

The previous prime is 203431357. The next prime is 203431379. The reversal of 203431361 is 163134302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203431361 - 2² = 203431357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (203431561) 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, 14530805 + ... + 14530818.

It is an arithmetic number, because the mean of its divisors is an integer number (58123248).

Almost surely, 2^203431361 is an apocalyptic number.

It is an amenable number.

203431361 is a deficient number, since it is larger than the sum of its proper divisors (29061631).

203431361 is an equidigital number, since it uses as much as digits as its factorization.

203431361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29061630.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 203431361 is about 14262.9366190837. The cubic root of 203431361 is about 588.1290546553.

Adding to 203431361 its reverse (163134302), we get a palindrome (366565663).

The spelling of 203431361 in words is "two hundred three million, four hundred thirty-one thousand, three hundred sixty-one".