203420131 has 2 divisors, whose sum is σ = 203420132. Its totient is φ = 203420130.

The previous prime is 203420111. The next prime is 203420153. The reversal of 203420131 is 131024302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203420131 - 2⁷ = 203420003 is a prime.

It is a super-2 number, since 2×203420131² = 82759499392114322, which contains 22 as substring.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (203420111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101710065 + 101710066.

It is an arithmetic number, because the mean of its divisors is an integer number (101710066).

Almost surely, 2^203420131 is an apocalyptic number.

203420131 is a deficient number, since it is larger than the sum of its proper divisors (1).

203420131 is an equidigital number, since it uses as much as digits as its factorization.

203420131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 203420131 is about 14262.5429359564. The cubic root of 203420131 is about 588.1182323141.

Adding to 203420131 its reverse (131024302), we get a palindrome (334444433).

The spelling of 203420131 in words is "two hundred three million, four hundred twenty thousand, one hundred thirty-one".