199554631 has 2 divisors, whose sum is σ = 199554632. Its totient is φ = 199554630.

The previous prime is 199554577. The next prime is 199554637. The reversal of 199554631 is 136455991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199554631 - 2¹⁹ = 199030343 is a prime.

It is a super-2 number, since 2×199554631² = 79644101507092322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199554637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99777315 + 99777316.

It is an arithmetic number, because the mean of its divisors is an integer number (99777316).

Almost surely, 2^199554631 is an apocalyptic number.

199554631 is a deficient number, since it is larger than the sum of its proper divisors (1).

199554631 is an equidigital number, since it uses as much as digits as its factorization.

199554631 is an odious number, because the sum of its binary digits is odd.

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

The square root of 199554631 is about 14126.3806758844. The cubic root of 199554631 is about 584.3691360751.

The spelling of 199554631 in words is "one hundred ninety-nine million, five hundred fifty-four thousand, six hundred thirty-one".