198071955 has 24 divisors (see below), whose sum is σ = 343895760. Its totient is φ = 105462720.

The previous prime is 198071893. The next prime is 198071957. The reversal of 198071955 is 559170891.

It is not a de Polignac number, because 198071955 - 2⁶ = 198071891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 198071955.

It is not an unprimeable number, because it can be changed into a prime (198071957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26416 + ... + 33074.

It is an arithmetic number, because the mean of its divisors is an integer number (14328990).

Almost surely, 2^198071955 is an apocalyptic number.

198071955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198071955 is a deficient number, since it is larger than the sum of its proper divisors (145823805).

198071955 is a wasteful number, since it uses less digits than its factorization.

198071955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7331 (or 7328 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 45.

The square root of 198071955 is about 14073.8038568114. The cubic root of 198071955 is about 582.9182638212.

The spelling of 198071955 in words is "one hundred ninety-eight million, seventy-one thousand, nine hundred fifty-five".