30198541 has 4 divisors (see below), whose sum is σ = 31239900. Its totient is φ = 29157184.

The previous prime is 30198533. The next prime is 30198551. The reversal of 30198541 is 14589103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6869641 + 23328900 = 2621^2 + 4830^2 .

It is a cyclic number.

It is not a de Polignac number, because 30198541 - 2³ = 30198533 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30198551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520636 + ... + 520693.

It is an arithmetic number, because the mean of its divisors is an integer number (7809975).

Almost surely, 2^30198541 is an apocalyptic number.

It is an amenable number.

30198541 is a deficient number, since it is larger than the sum of its proper divisors (1041359).

30198541 is a wasteful number, since it uses less digits than its factorization.

30198541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041358.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 30198541 is about 5495.3199178938. The cubic root of 30198541 is about 311.4072029439.

The spelling of 30198541 in words is "thirty million, one hundred ninety-eight thousand, five hundred forty-one".