199109554 has 16 divisors (see below), whose sum is σ = 345168000. Its totient is φ = 84373344.

The previous prime is 199109549. The next prime is 199109557. The reversal of 199109554 is 455901991.

It is a super-2 number, since 2×199109554² = 79289228988157832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 199109554.

It is not an unprimeable number, because it can be changed into a prime (199109557) 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 7 ways as a sum of consecutive naturals, for example, 78654 + ... + 81145.

It is an arithmetic number, because the mean of its divisors is an integer number (21573000).

Almost surely, 2^199109554 is an apocalyptic number.

199109554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

199109554 is a deficient number, since it is larger than the sum of its proper divisors (146058446).

199109554 is a wasteful number, since it uses less digits than its factorization.

199109554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159897.

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 199109554 is about 14110.6184839645. The cubic root of 199109554 is about 583.9343631274.

The spelling of 199109554 in words is "one hundred ninety-nine million, one hundred nine thousand, five hundred fifty-four".