199550800531 has 2 divisors, whose sum is σ = 199550800532. Its totient is φ = 199550800530.

The previous prime is 199550800529. The next prime is 199550800543. The reversal of 199550800531 is 135008055991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199550800531 - 2¹ = 199550800529 is a prime.

It is a super-2 number, since 2×199550800531² (a number of 23 digits) contains 22 as substring.

Together with 199550800529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (199550806531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99775400265 + 99775400266.

It is an arithmetic number, because the mean of its divisors is an integer number (99775400266).

Almost surely, 2^199550800531 is an apocalyptic number.

199550800531 is a deficient number, since it is larger than the sum of its proper divisors (1).

199550800531 is an equidigital number, since it uses as much as digits as its factorization.

199550800531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 46.

The spelling of 199550800531 in words is "one hundred ninety-nine billion, five hundred fifty million, eight hundred thousand, five hundred thirty-one".