199154855 has 16 divisors (see below), whose sum is σ = 242416800. Its totient is φ = 157048320.

The previous prime is 199154821. The next prime is 199154869. The reversal of 199154855 is 558451991.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-199154855 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231416 + ... + 232274.

It is an arithmetic number, because the mean of its divisors is an integer number (15151050).

Almost surely, 2^199154855 is an apocalyptic number.

199154855 is a deficient number, since it is larger than the sum of its proper divisors (43261945).

199154855 is an equidigital number, since it uses as much as digits as its factorization.

199154855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474.

The product of its digits is 324000, while the sum is 47.

The square root of 199154855 is about 14112.2236022535. The cubic root of 199154855 is about 583.9786449547.

The spelling of 199154855 in words is "one hundred ninety-nine million, one hundred fifty-four thousand, eight hundred fifty-five".