1218152311 has 2 divisors, whose sum is σ = 1218152312. Its totient is φ = 1218152310.

The previous prime is 1218152297. The next prime is 1218152407. The reversal of 1218152311 is 1132518121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1218152311 - 2²⁵ = 1184597879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218152711) 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, 609076155 + 609076156.

It is an arithmetic number, because the mean of its divisors is an integer number (609076156).

Almost surely, 2^1218152311 is an apocalyptic number.

1218152311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218152311 is an equidigital number, since it uses as much as digits as its factorization.

1218152311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 25.

The square root of 1218152311 is about 34902.0387799911. The cubic root of 1218152311 is about 1067.9900284644.

The spelling of 1218152311 in words is "one billion, two hundred eighteen million, one hundred fifty-two thousand, three hundred eleven".