199122151 has 2 divisors, whose sum is σ = 199122152. Its totient is φ = 199122150.

The previous prime is 199122137. The next prime is 199122167. The reversal of 199122151 is 151221991.

It is a weak prime.

It is an emirp because it is prime and its reverse (151221991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199122151 - 2¹⁵ = 199089383 is a prime.

It is equal to p_11032978 and since 199122151 and 11032978 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199122851) 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 as a sum of consecutive naturals, namely, 99561075 + 99561076.

It is an arithmetic number, because the mean of its divisors is an integer number (99561076).

Almost surely, 2^199122151 is an apocalyptic number.

199122151 is a deficient number, since it is larger than the sum of its proper divisors (1).

199122151 is an equidigital number, since it uses as much as digits as its factorization.

199122151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 31.

The square root of 199122151 is about 14111.0648428813. The cubic root of 199122151 is about 583.9466773968.

It can be divided in two parts, 1991 and 22151, that added together give a palindrome (24142).

The spelling of 199122151 in words is "one hundred ninety-nine million, one hundred twenty-two thousand, one hundred fifty-one".