198031031 has 16 divisors (see below), whose sum is σ = 219071520. Its totient is φ = 177515520.

The previous prime is 198031021. The next prime is 198031033. The reversal of 198031031 is 130130891.

It is a cyclic number.

It is not a de Polignac number, because 198031031 - 2¹⁴ = 198014647 is a prime.

It is a super-2 number, since 2×198031031² = 78432578477845922, 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 (198031033) 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 15 ways as a sum of consecutive naturals, for example, 388805 + ... + 389313.

It is an arithmetic number, because the mean of its divisors is an integer number (13691970).

Almost surely, 2^198031031 is an apocalyptic number.

198031031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

198031031 is a deficient number, since it is larger than the sum of its proper divisors (21040489).

198031031 is a wasteful number, since it uses less digits than its factorization.

198031031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 198031031 is about 14072.3498748432. The cubic root of 198031031 is about 582.8781151286.

The spelling of 198031031 in words is "one hundred ninety-eight million, thirty-one thousand, thirty-one".