198512061 has 16 divisors (see below), whose sum is σ = 289067520. Its totient is φ = 120175920.

The previous prime is 198512059. The next prime is 198512063. The reversal of 198512061 is 160215891.

It is an interprime number because it is at equal distance from previous prime (198512059) and next prime (198512063).

It is not a de Polignac number, because 198512061 - 2¹ = 198512059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198512063) 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 15 ways as a sum of consecutive naturals, for example, 32250 + ... + 37908.

It is an arithmetic number, because the mean of its divisors is an integer number (18066720).

Almost surely, 2^198512061 is an apocalyptic number.

198512061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

198512061 is a deficient number, since it is larger than the sum of its proper divisors (90555459).

198512061 is a wasteful number, since it uses less digits than its factorization.

198512061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6736.

The product of its (nonzero) digits is 4320, while the sum is 33.

The square root of 198512061 is about 14089.4308259773. The cubic root of 198512061 is about 583.3496828796.

It can be divided in two parts, 19851 and 2061, that added together give a palindrome (21912).

The spelling of 198512061 in words is "one hundred ninety-eight million, five hundred twelve thousand, sixty-one".