199364551 has 2 divisors, whose sum is σ = 199364552. Its totient is φ = 199364550.

The previous prime is 199364537. The next prime is 199364563. The reversal of 199364551 is 155463991.

It is a strong prime.

It is an emirp because it is prime and its reverse (155463991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199364551 - 2⁵ = 199364519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199364498 and 199364507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199364051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99682275 + 99682276.

It is an arithmetic number, because the mean of its divisors is an integer number (99682276).

Almost surely, 2^199364551 is an apocalyptic number.

199364551 is the 6315-th centered decagonal number.

199364551 is a deficient number, since it is larger than the sum of its proper divisors (1).

199364551 is an equidigital number, since it uses as much as digits as its factorization.

199364551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 43.

The square root of 199364551 is about 14119.6512350695. The cubic root of 199364551 is about 584.1835358191.

The spelling of 199364551 in words is "one hundred ninety-nine million, three hundred sixty-four thousand, five hundred fifty-one".