199154385 has 48 divisors (see below), whose sum is σ = 358225920. Its totient is φ = 102245760.

The previous prime is 199154381. The next prime is 199154411. The reversal of 199154385 is 583451991.

199154385 is a `hidden beast` number, since 19 + 91 + 543 + 8 + 5 = 666.

It is not a de Polignac number, because 199154385 - 2² = 199154381 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 199154385.

It is not an unprimeable number, because it can be changed into a prime (199154381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 511771 + ... + 512159.

It is an arithmetic number, because the mean of its divisors is an integer number (7463040).

Almost surely, 2^199154385 is an apocalyptic number.

199154385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199154385 is a deficient number, since it is larger than the sum of its proper divisors (159071535).

199154385 is a wasteful number, since it uses less digits than its factorization.

199154385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 795 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 199154385 is about 14112.2069500132. The cubic root of 199154385 is about 583.9781855632.

The spelling of 199154385 in words is "one hundred ninety-nine million, one hundred fifty-four thousand, three hundred eighty-five".