200000031 has 16 divisors (see below), whose sum is σ = 332467968. Its totient is φ = 103896000.

The previous prime is 199999991. The next prime is 200000033. The reversal of 200000031 is 130000002.

It is not a de Polignac number, because 200000031 - 2⁷ = 199999903 is a prime.

It is a super-2 number, since 2×200000031² = 80000024800001922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199999965 and 200000019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200000033) 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 in 15 ways as a sum of consecutive naturals, for example, 432670 + ... + 433131.

It is an arithmetic number, because the mean of its divisors is an integer number (20779248).

Almost surely, 2^200000031 is an apocalyptic number.

200000031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

200000031 is a deficient number, since it is larger than the sum of its proper divisors (132467937).

200000031 is a wasteful number, since it uses less digits than its factorization.

200000031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865822.

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 200000031 is about 14142.1367197464. The cubic root of 200000031 is about 584.8035778574.

Adding to 200000031 its reverse (130000002), we get a palindrome (330000033).

The spelling of 200000031 in words is "two hundred million, thirty-one", and thus it is an aban number.