1821192151 has 2 divisors, whose sum is σ = 1821192152. Its totient is φ = 1821192150.

The previous prime is 1821192127. The next prime is 1821192157. The reversal of 1821192151 is 1512911281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1821192151 - 2¹¹ = 1821190103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1821192157) 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, 910596075 + 910596076.

It is an arithmetic number, because the mean of its divisors is an integer number (910596076).

Almost surely, 2^1821192151 is an apocalyptic number.

1821192151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821192151 is an equidigital number, since it uses as much as digits as its factorization.

1821192151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 31.

The square root of 1821192151 is about 42675.4279533316. The cubic root of 1821192151 is about 1221.1956724973.

The spelling of 1821192151 in words is "one billion, eight hundred twenty-one million, one hundred ninety-two thousand, one hundred fifty-one".