199551 has 8 divisors (see below), whose sum is σ = 290304. Its totient is φ = 120920.

The previous prime is 199523. The next prime is 199559. The reversal of 199551 is 155991.

199551 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199551 - 2⁶ = 199487 is a prime.

199551 is strictly pandigital in base 7.

199551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2991 + ... + 3056.

It is an arithmetic number, because the mean of its divisors is an integer number (36288).

2¹⁹⁹⁵⁵¹ is an apocalyptic number.

199551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

199551 is a deficient number, since it is larger than the sum of its proper divisors (90753).

199551 is a wasteful number, since it uses less digits than its factorization.

199551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061.

The product of its digits is 2025, while the sum is 30.

The square root of 199551 is about 446.7113161763. The cubic root of 199551 is about 58.4365591754.

The spelling of 199551 in words is "one hundred ninety-nine thousand, five hundred fifty-one".