198155053 has 4 divisors (see below), whose sum is σ = 198335808. Its totient is φ = 197974300.

The previous prime is 198155033. The next prime is 198155059. The reversal of 198155053 is 350551891.

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: 350551891 = 2099 ⋅167009.

It is a cyclic number.

It is not a de Polignac number, because 198155053 - 2²⁵ = 164600621 is a prime.

It is a super-3 number, since 3×198155053³ (a number of 26 digits) contains 333 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 (198155059) 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, 88723 + ... + 90928.

It is an arithmetic number, because the mean of its divisors is an integer number (49583952).

Almost surely, 2^198155053 is an apocalyptic number.

It is an amenable number.

198155053 is a deficient number, since it is larger than the sum of its proper divisors (180755).

198155053 is a wasteful number, since it uses less digits than its factorization.

198155053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180754.

The product of its (nonzero) digits is 27000, while the sum is 37.

The square root of 198155053 is about 14076.7557697077. The cubic root of 198155053 is about 582.9997705132. Note that the first 3 decimals are identical.

The spelling of 198155053 in words is "one hundred ninety-eight million, one hundred fifty-five thousand, fifty-three".