1155161443 has 2 divisors, whose sum is σ = 1155161444. Its totient is φ = 1155161442.

The previous prime is 1155161327. The next prime is 1155161473. The reversal of 1155161443 is 3441615511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155161443 - 2²¹ = 1153064291 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155161473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577580721 + 577580722.

It is an arithmetic number, because the mean of its divisors is an integer number (577580722).

Almost surely, 2^1155161443 is an apocalyptic number.

1155161443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155161443 is an equidigital number, since it uses as much as digits as its factorization.

1155161443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 31.

The square root of 1155161443 is about 33987.6660422572. Note that the first 3 decimals coincide. The cubic root of 1155161443 is about 1049.2546313998.

Adding to 1155161443 its reverse (3441615511), we get a palindrome (4596776954).

The spelling of 1155161443 in words is "one billion, one hundred fifty-five million, one hundred sixty-one thousand, four hundred forty-three".