204030031 has 2 divisors, whose sum is σ = 204030032. Its totient is φ = 204030030.

The previous prime is 204030017. The next prime is 204030041. The reversal of 204030031 is 130030402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204030031 - 2⁹ = 204029519 is a prime.

It is a super-2 number, since 2×204030031² = 83256507099721922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204029993 and 204030020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204030041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102015015 + 102015016.

It is an arithmetic number, because the mean of its divisors is an integer number (102015016).

Almost surely, 2^204030031 is an apocalyptic number.

204030031 is a deficient number, since it is larger than the sum of its proper divisors (1).

204030031 is an equidigital number, since it uses as much as digits as its factorization.

204030031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 204030031 is about 14283.9081136781. The cubic root of 204030031 is about 588.7054167823.

Adding to 204030031 its reverse (130030402), we get a palindrome (334060433).

The spelling of 204030031 in words is "two hundred four million, thirty thousand, thirty-one".