198513539 has 24 divisors (see below), whose sum is σ = 253581408. Its totient is φ = 151683840.

The previous prime is 198513533. The next prime is 198513559. The reversal of 198513539 is 935315891.

198513539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198513539 - 2⁸ = 198513283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198513539.

It is not an unprimeable number, because it can be changed into a prime (198513533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40649 + ... + 45269.

It is an arithmetic number, because the mean of its divisors is an integer number (10565892).

Almost surely, 2^198513539 is an apocalyptic number.

198513539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

198513539 is a deficient number, since it is larger than the sum of its proper divisors (55067869).

198513539 is a wasteful number, since it uses less digits than its factorization.

198513539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4683 (or 4664 counting only the distinct ones).

The product of its digits is 145800, while the sum is 44.

The square root of 198513539 is about 14089.4832765435. The cubic root of 198513539 is about 583.3511306316.

The spelling of 198513539 in words is "one hundred ninety-eight million, five hundred thirteen thousand, five hundred thirty-nine".