199829551 has 4 divisors (see below), whose sum is σ = 199859400. Its totient is φ = 199799704.

The previous prime is 199829549. The next prime is 199829561. The reversal of 199829551 is 155928991.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 155928991 = 19 ⋅8206789.

It is a cyclic number.

It is not a de Polignac number, because 199829551 - 2¹ = 199829549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199829495 and 199829504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199829501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285 + ... + 19993.

It is an arithmetic number, because the mean of its divisors is an integer number (49964850).

Almost surely, 2^199829551 is an apocalyptic number.

199829551 is a deficient number, since it is larger than the sum of its proper divisors (29849).

199829551 is a wasteful number, since it uses less digits than its factorization.

199829551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29848.

The product of its digits is 291600, while the sum is 49.

The square root of 199829551 is about 14136.1080570290. The cubic root of 199829551 is about 584.6373684587.

The spelling of 199829551 in words is "one hundred ninety-nine million, eight hundred twenty-nine thousand, five hundred fifty-one".