199089800051281 has 4 divisors (see below), whose sum is σ = 199116264208752. Its totient is φ = 199063335893812.

The previous prime is 199089800051183. The next prime is 199089800051297. The reversal of 199089800051281 is 182150008980991.

199089800051281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 199089800051281 - 2²³ = 199089791662673 is a prime.

It is a super-2 number, since 2×199089800051281² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199089800031281) 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, 13232067451 + ... + 13232082496.

It is an arithmetic number, because the mean of its divisors is an integer number (49779066052188).

Almost surely, 2^{199089800051281} is an apocalyptic number.

It is an amenable number.

199089800051281 is a deficient number, since it is larger than the sum of its proper divisors (26464157471).

199089800051281 is an equidigital number, since it uses as much as digits as its factorization.

199089800051281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26464157470.

The product of its (nonzero) digits is 3732480, while the sum is 61.

The spelling of 199089800051281 in words is "one hundred ninety-nine trillion, eighty-nine billion, eight hundred million, fifty-one thousand, two hundred eighty-one".