231800019 has 64 divisors (see below), whose sum is σ = 371589120. Its totient is φ = 127008000.

The previous prime is 231800011. The next prime is 231800021. The reversal of 231800019 is 910008132.

It is not a de Polignac number, because 231800019 - 2³ = 231800011 is a prime.

It is a super-2 number, since 2×231800019² = 107462497616800722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231800011) 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 63 ways as a sum of consecutive naturals, for example, 1825134 + ... + 1825260.

It is an arithmetic number, because the mean of its divisors is an integer number (5806080).

Almost surely, 2^231800019 is an apocalyptic number.

231800019 is a deficient number, since it is larger than the sum of its proper divisors (139789101).

231800019 is a wasteful number, since it uses less digits than its factorization.

231800019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 231800019 is about 15224.9800985092. The cubic root of 231800019 is about 614.2867612256.

The spelling of 231800019 in words is "two hundred thirty-one million, eight hundred thousand, nineteen".