199996031 has 4 divisors (see below), whose sum is σ = 200190672. Its totient is φ = 199801392.

The previous prime is 199995979. The next prime is 199996051. The reversal of 199996031 is 130699991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130699991 = 6217 ⋅21023.

It is a cyclic number.

It is not a de Polignac number, because 199996031 - 2¹⁸ = 199733887 is a prime.

It is a super-2 number, since 2×199996031² = 79996824831505922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199996051) 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, 95771 + ... + 97836.

It is an arithmetic number, because the mean of its divisors is an integer number (50047668).

Almost surely, 2^199996031 is an apocalyptic number.

199996031 is a deficient number, since it is larger than the sum of its proper divisors (194641).

199996031 is a wasteful number, since it uses less digits than its factorization.

199996031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194640.

The product of its (nonzero) digits is 118098, while the sum is 47.

The square root of 199996031 is about 14141.9952976940. The cubic root of 199996031 is about 584.7996791415.

It can be divided in two parts, 1999960 and 31, that added together give a palindrome (1999991).

The spelling of 199996031 in words is "one hundred ninety-nine million, nine hundred ninety-six thousand, thirty-one".