198554155 has 8 divisors (see below), whose sum is σ = 246481200. Its totient is φ = 153365856.

The previous prime is 198554143. The next prime is 198554159. The reversal of 198554155 is 551455891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198554155 - 2¹⁷ = 198423083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198554159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684525 + ... + 684814.

It is an arithmetic number, because the mean of its divisors is an integer number (30810150).

Almost surely, 2^198554155 is an apocalyptic number.

198554155 is a deficient number, since it is larger than the sum of its proper divisors (47927045).

198554155 is a wasteful number, since it uses less digits than its factorization.

198554155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369373.

The product of its digits is 180000, while the sum is 43.

The square root of 198554155 is about 14090.9245615751. The cubic root of 198554155 is about 583.3909125930.

The spelling of 198554155 in words is "one hundred ninety-eight million, five hundred fifty-four thousand, one hundred fifty-five".