1151371181 has 2 divisors, whose sum is σ = 1151371182. Its totient is φ = 1151371180.

The previous prime is 1151371171. The next prime is 1151371211. The reversal of 1151371181 is 1811731511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1097861956 + 53509225 = 33134^2 + 7315^2 .

It is an emirp because it is prime and its reverse (1811731511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1151371181 - 2¹⁴ = 1151354797 is a prime.

It is a super-2 number, since 2×1151371181² = 2651311192874669522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151371141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575685590 + 575685591.

It is an arithmetic number, because the mean of its divisors is an integer number (575685591).

Almost surely, 2^1151371181 is an apocalyptic number.

It is an amenable number.

1151371181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151371181 is an equidigital number, since it uses as much as digits as its factorization.

1151371181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 29.

The square root of 1151371181 is about 33931.8608537758. The cubic root of 1151371181 is about 1048.1057854703.

The spelling of 1151371181 in words is "one billion, one hundred fifty-one million, three hundred seventy-one thousand, one hundred eighty-one".