199542207 has 4 divisors (see below), whose sum is σ = 266056280. Its totient is φ = 133028136.

The previous prime is 199542197. The next prime is 199542223. The reversal of 199542207 is 702245991.

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

It is not a de Polignac number, because 199542207 - 2¹⁰ = 199541183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199542247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33257032 + ... + 33257037.

It is an arithmetic number, because the mean of its divisors is an integer number (66514070).

Almost surely, 2^199542207 is an apocalyptic number.

199542207 is a deficient number, since it is larger than the sum of its proper divisors (66514073).

199542207 is an equidigital number, since it uses as much as digits as its factorization.

199542207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66514072.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 199542207 is about 14125.9409244128. The cubic root of 199542207 is about 584.3570084808.

The spelling of 199542207 in words is "one hundred ninety-nine million, five hundred forty-two thousand, two hundred seven".