198163031 has 6 divisors (see below), whose sum is σ = 217815696. Its totient is φ = 180148100.

The previous prime is 198163013. The next prime is 198163087. The reversal of 198163031 is 130361891.

It is not a de Polignac number, because 198163031 - 2¹⁰ = 198162007 is a prime.

It is a super-2 number, since 2×198163031² = 78537173710213922, 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 (198163631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 818735 + ... + 818976.

It is an arithmetic number, because the mean of its divisors is an integer number (36302616).

Almost surely, 2^198163031 is an apocalyptic number.

198163031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

198163031 is a deficient number, since it is larger than the sum of its proper divisors (19652665).

198163031 is a wasteful number, since it uses less digits than its factorization.

198163031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637733 (or 1637722 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 198163031 is about 14077.0391418082. The cubic root of 198163031 is about 583.0075945374.

The spelling of 198163031 in words is "one hundred ninety-eight million, one hundred sixty-three thousand, thirty-one".