1151205191 has 2 divisors, whose sum is σ = 1151205192. Its totient is φ = 1151205190.

The previous prime is 1151205173. The next prime is 1151205203. The reversal of 1151205191 is 1915021511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1151205191 - 2¹⁸ = 1150943047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1151205191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151205151) 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, 575602595 + 575602596.

It is an arithmetic number, because the mean of its divisors is an integer number (575602596).

Almost surely, 2^1151205191 is an apocalyptic number.

1151205191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151205191 is an equidigital number, since it uses as much as digits as its factorization.

1151205191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 26.

The square root of 1151205191 is about 33929.4148343292. The cubic root of 1151205191 is about 1048.0554155452.

The spelling of 1151205191 in words is "one billion, one hundred fifty-one million, two hundred five thousand, one hundred ninety-one".