198131655 has 8 divisors (see below), whose sum is σ = 317010672. Its totient is φ = 105670208.

The previous prime is 198131629. The next prime is 198131671. The reversal of 198131655 is 556131891.

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 198131655 - 2¹³ = 198123463 is a prime.

It is a super-3 number, since 3×198131655³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6604374 + ... + 6604403.

It is an arithmetic number, because the mean of its divisors is an integer number (39626334).

Almost surely, 2^198131655 is an apocalyptic number.

198131655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198131655 is a deficient number, since it is larger than the sum of its proper divisors (118879017).

198131655 is a wasteful number, since it uses less digits than its factorization.

198131655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13208785.

The product of its digits is 32400, while the sum is 39.

The square root of 198131655 is about 14075.9246587924. The cubic root of 198131655 is about 582.9768228848.

The spelling of 198131655 in words is "one hundred ninety-eight million, one hundred thirty-one thousand, six hundred fifty-five".