198516541 has 4 divisors (see below), whose sum is σ = 208964800. Its totient is φ = 188068284.

The previous prime is 198516523. The next prime is 198516551. The reversal of 198516541 is 145615891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145615891 = 5107 ⋅28513.

It is a cyclic number.

It is not a de Polignac number, because 198516541 - 2⁷ = 198516413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198516494 and 198516503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198516551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5224101 + ... + 5224138.

It is an arithmetic number, because the mean of its divisors is an integer number (52241200).

Almost surely, 2^198516541 is an apocalyptic number.

It is an amenable number.

198516541 is a deficient number, since it is larger than the sum of its proper divisors (10448259).

198516541 is a wasteful number, since it uses less digits than its factorization.

198516541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10448258.

The product of its digits is 43200, while the sum is 40.

The square root of 198516541 is about 14089.5898095012. The cubic root of 198516541 is about 583.3540711720.

The spelling of 198516541 in words is "one hundred ninety-eight million, five hundred sixteen thousand, five hundred forty-one".