1161331051 has 2 divisors, whose sum is σ = 1161331052. Its totient is φ = 1161331050.

The previous prime is 1161331049. The next prime is 1161331069. The reversal of 1161331051 is 1501331611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161331051 - 2¹ = 1161331049 is a prime.

Together with 1161331049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1161331001) 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, 580665525 + 580665526.

It is an arithmetic number, because the mean of its divisors is an integer number (580665526).

Almost surely, 2^1161331051 is an apocalyptic number.

1161331051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161331051 is an equidigital number, since it uses as much as digits as its factorization.

1161331051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 1161331051 is about 34078.3076311016. The cubic root of 1161331051 is about 1051.1193055589.

Adding to 1161331051 its reverse (1501331611), we get a palindrome (2662662662).

The spelling of 1161331051 in words is "one billion, one hundred sixty-one million, three hundred thirty-one thousand, fifty-one".