198813615 has 64 divisors (see below), whose sum is σ = 427133952. Its totient is φ = 76262400.

The previous prime is 198813613. The next prime is 198813661. The reversal of 198813615 is 516318891.

It is not a de Polignac number, because 198813615 - 2¹ = 198813613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198813611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8395 + ... + 21635.

It is an arithmetic number, because the mean of its divisors is an integer number (6673968).

Almost surely, 2^198813615 is an apocalyptic number.

198813615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198813615 is an abundant number, since it is smaller than the sum of its proper divisors (228320337).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198813615 is a wasteful number, since it uses less digits than its factorization.

198813615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13280.

The product of its digits is 51840, while the sum is 42.

The square root of 198813615 is about 14100.1281909066. The cubic root of 198813615 is about 583.6449167149.

The spelling of 198813615 in words is "one hundred ninety-eight million, eight hundred thirteen thousand, six hundred fifteen".