199923055 has 4 divisors (see below), whose sum is σ = 239907672. Its totient is φ = 159938440.

The previous prime is 199923037. The next prime is 199923067. The reversal of 199923055 is 550329991.

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

It is not a de Polignac number, because 199923055 - 2⁹ = 199922543 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, 19992301 + ... + 19992310.

It is an arithmetic number, because the mean of its divisors is an integer number (59976918).

Almost surely, 2^199923055 is an apocalyptic number.

199923055 is a deficient number, since it is larger than the sum of its proper divisors (39984617).

199923055 is an equidigital number, since it uses as much as digits as its factorization.

199923055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39984616.

The product of its (nonzero) digits is 109350, while the sum is 43.

The square root of 199923055 is about 14139.4149454636. The cubic root of 199923055 is about 584.7285418413.

The spelling of 199923055 in words is "one hundred ninety-nine million, nine hundred twenty-three thousand, fifty-five".