1161335551 has 2 divisors, whose sum is σ = 1161335552. Its totient is φ = 1161335550.

The previous prime is 1161335491. The next prime is 1161335557. The reversal of 1161335551 is 1555331611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1161335551 - 2⁹ = 1161335039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161335557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580667775 + 580667776.

It is an arithmetic number, because the mean of its divisors is an integer number (580667776).

Almost surely, 2^1161335551 is an apocalyptic number.

1161335551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161335551 is an equidigital number, since it uses as much as digits as its factorization.

1161335551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6750, while the sum is 31.

The square root of 1161335551 is about 34078.3736554431. The cubic root of 1161335551 is about 1051.1206632053.

The spelling of 1161335551 in words is "one billion, one hundred sixty-one million, three hundred thirty-five thousand, five hundred fifty-one".