1178223551 has 2 divisors, whose sum is σ = 1178223552. Its totient is φ = 1178223550.

The previous prime is 1178223547. The next prime is 1178223559. The reversal of 1178223551 is 1553228711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1178223551 - 2² = 1178223547 is a prime.

It is a super-2 number, since 2×1178223551² = 2776421472262099202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1178223559) 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, 589111775 + 589111776.

It is an arithmetic number, because the mean of its divisors is an integer number (589111776).

Almost surely, 2^1178223551 is an apocalyptic number.

1178223551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1178223551 is an equidigital number, since it uses as much as digits as its factorization.

1178223551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 35.

The square root of 1178223551 is about 34325.2611206383. The cubic root of 1178223551 is about 1056.1912529398.

The spelling of 1178223551 in words is "one billion, one hundred seventy-eight million, two hundred twenty-three thousand, five hundred fifty-one".