198250015 has 4 divisors (see below), whose sum is σ = 237900024. Its totient is φ = 158600008.

The previous prime is 198250007. The next prime is 198250021. The reversal of 198250015 is 510052891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510052891 = 19 ⋅26844889.

It is a cyclic number.

It is not a de Polignac number, because 198250015 - 2³ = 198250007 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19824997 + ... + 19825006.

It is an arithmetic number, because the mean of its divisors is an integer number (59475006).

Almost surely, 2^198250015 is an apocalyptic number.

198250015 is a deficient number, since it is larger than the sum of its proper divisors (39650009).

198250015 is an equidigital number, since it uses as much as digits as its factorization.

198250015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39650008.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 198250015 is about 14080.1283729943. The cubic root of 198250015 is about 583.0928861178.

The spelling of 198250015 in words is "one hundred ninety-eight million, two hundred fifty thousand, fifteen".