198053381 has 4 divisors (see below), whose sum is σ = 198120000. Its totient is φ = 197986764.

The previous prime is 198053377. The next prime is 198053393. The reversal of 198053381 is 183350891.

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.

It is a cyclic number.

It is not a de Polignac number, because 198053381 - 2² = 198053377 is a prime.

It is a super-2 number, since 2×198053381² = 78450283451062322, 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 (198053311) 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, 28631 + ... + 34868.

It is an arithmetic number, because the mean of its divisors is an integer number (49530000).

Almost surely, 2^198053381 is an apocalyptic number.

It is an amenable number.

198053381 is a deficient number, since it is larger than the sum of its proper divisors (66619).

198053381 is an equidigital number, since it uses as much as digits as its factorization.

198053381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66618.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 198053381 is about 14073.1439628819. The cubic root of 198053381 is about 582.9000423921.

The spelling of 198053381 in words is "one hundred ninety-eight million, fifty-three thousand, three hundred eighty-one".