158198195 has 4 divisors (see below), whose sum is σ = 189837840. Its totient is φ = 126558552.

The previous prime is 158198191. The next prime is 158198221. The reversal of 158198195 is 591891851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 591891851 = 3181 ⋅186071.

It is a cyclic number.

It is not a de Polignac number, because 158198195 - 2² = 158198191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158198191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15819815 + ... + 15819824.

It is an arithmetic number, because the mean of its divisors is an integer number (47459460).

Almost surely, 2^158198195 is an apocalyptic number.

158198195 is a deficient number, since it is larger than the sum of its proper divisors (31639645).

158198195 is an equidigital number, since it uses as much as digits as its factorization.

158198195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31639644.

The product of its digits is 129600, while the sum is 47.

The square root of 158198195 is about 12577.6863929739. The cubic root of 158198195 is about 540.8379707997.

The spelling of 158198195 in words is "one hundred fifty-eight million, one hundred ninety-eight thousand, one hundred ninety-five".