199019655 has 24 divisors (see below), whose sum is σ = 346217040. Its totient is φ = 105759360.

The previous prime is 199019651. The next prime is 199019669. The reversal of 199019655 is 556910991.

It is a happy number.

It is not a de Polignac number, because 199019655 - 2² = 199019651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 199019655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199019651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4776 + ... + 20514.

It is an arithmetic number, because the mean of its divisors is an integer number (14425710).

Almost surely, 2^199019655 is an apocalyptic number.

199019655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199019655 is a deficient number, since it is larger than the sum of its proper divisors (147197385).

199019655 is a wasteful number, since it uses less digits than its factorization.

199019655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16031 (or 16028 counting only the distinct ones).

The product of its (nonzero) digits is 109350, while the sum is 45.

The square root of 199019655 is about 14107.4326154691. The cubic root of 199019655 is about 583.8464667627.

The spelling of 199019655 in words is "one hundred ninety-nine million, nineteen thousand, six hundred fifty-five".