198553831 has 12 divisors (see below), whose sum is σ = 231884208. Its totient is φ = 169516032.

The previous prime is 198553813. The next prime is 198553837. The reversal of 198553831 is 138355891.

It is not a de Polignac number, because 198553831 - 2⁵ = 198553799 is a prime.

It is a super-2 number, since 2×198553831² = 78847247609553122, 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 (198553837) 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 11 ways as a sum of consecutive naturals, for example, 4710 + ... + 20476.

It is an arithmetic number, because the mean of its divisors is an integer number (19323684).

Almost surely, 2^198553831 is an apocalyptic number.

198553831 is a deficient number, since it is larger than the sum of its proper divisors (33330377).

198553831 is a wasteful number, since it uses less digits than its factorization.

198553831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16038 (or 16031 counting only the distinct ones).

The product of its digits is 129600, while the sum is 43.

The square root of 198553831 is about 14090.9130648088. The cubic root of 198553831 is about 583.3905952677.

The spelling of 198553831 in words is "one hundred ninety-eight million, five hundred fifty-three thousand, eight hundred thirty-one".