198161515 has 8 divisors (see below), whose sum is σ = 239108688. Its totient is φ = 157652640.

The previous prime is 198161479. The next prime is 198161521. The reversal of 198161515 is 515161891.

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

It is not a de Polignac number, because 198161515 - 2⁷ = 198161387 is a prime.

It is a Duffinian 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, 108577 + ... + 110386.

It is an arithmetic number, because the mean of its divisors is an integer number (29888586).

Almost surely, 2^198161515 is an apocalyptic number.

198161515 is a deficient number, since it is larger than the sum of its proper divisors (40947173).

198161515 is a wasteful number, since it uses less digits than its factorization.

198161515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219149.

The product of its digits is 10800, while the sum is 37.

The square root of 198161515 is about 14076.9852951546. The cubic root of 198161515 is about 583.0061078124.

The spelling of 198161515 in words is "one hundred ninety-eight million, one hundred sixty-one thousand, five hundred fifteen".