198922615 has 4 divisors (see below), whose sum is σ = 238707144. Its totient is φ = 159138088.

The previous prime is 198922579. The next prime is 198922637. The reversal of 198922615 is 516229891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198922615 - 2⁷ = 198922487 is a prime.

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, 19892257 + ... + 19892266.

It is an arithmetic number, because the mean of its divisors is an integer number (59676786).

Almost surely, 2^198922615 is an apocalyptic number.

198922615 is a deficient number, since it is larger than the sum of its proper divisors (39784529).

198922615 is an equidigital number, since it uses as much as digits as its factorization.

198922615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39784528.

The product of its digits is 77760, while the sum is 43.

The square root of 198922615 is about 14103.9928743601. The cubic root of 198922615 is about 583.7515587631.

The spelling of 198922615 in words is "one hundred ninety-eight million, nine hundred twenty-two thousand, six hundred fifteen".