1151151181 has 2 divisors, whose sum is σ = 1151151182. Its totient is φ = 1151151180.

The previous prime is 1151151061. The next prime is 1151151217. The reversal of 1151151181 is 1811511511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 842973156 + 308178025 = 29034^2 + 17555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151151181 - 2¹⁵ = 1151118413 is a prime.

It is a super-2 number, since 2×1151151181² = 2650298083035389522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151154181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575575590 + 575575591.

It is an arithmetic number, because the mean of its divisors is an integer number (575575591).

Almost surely, 2^1151151181 is an apocalyptic number.

It is an amenable number.

1151151181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151151181 is an equidigital number, since it uses as much as digits as its factorization.

1151151181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 200, while the sum is 25.

The square root of 1151151181 is about 33928.6189079367. The cubic root of 1151151181 is about 1048.0390250822.

Adding to 1151151181 its reverse (1811511511), we get a palindrome (2962662692).

The spelling of 1151151181 in words is "one billion, one hundred fifty-one million, one hundred fifty-one thousand, one hundred eighty-one".