199055261 has 8 divisors (see below), whose sum is σ = 214220664. Its totient is φ = 184273920.

The previous prime is 199055249. The next prime is 199055281. The reversal of 199055261 is 162550991.

It can be written as a sum of positive squares in 4 ways, for example, as 39816100 + 159239161 = 6310^2 + 12619^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199055261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199055201) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 94940 + ... + 97013.

It is an arithmetic number, because the mean of its divisors is an integer number (26777583).

Almost surely, 2^199055261 is an apocalyptic number.

It is an amenable number.

199055261 is a deficient number, since it is larger than the sum of its proper divisors (15165403).

199055261 is a wasteful number, since it uses less digits than its factorization.

199055261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192031.

The product of its (nonzero) digits is 24300, while the sum is 38.

The square root of 199055261 is about 14108.6945179205. The cubic root of 199055261 is about 583.8812827506.

The spelling of 199055261 in words is "one hundred ninety-nine million, fifty-five thousand, two hundred sixty-one".