1318822331 has 2 divisors, whose sum is σ = 1318822332. Its totient is φ = 1318822330.

The previous prime is 1318822321. The next prime is 1318822363. The reversal of 1318822331 is 1332288131.

It is an a-pointer prime, because the next prime (1318822363) can be obtained adding 1318822331 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1318822331 - 2²² = 1314628027 is a prime.

It is a super-2 number, since 2×1318822331² = 3478584681488547122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1318822321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659411165 + 659411166.

It is an arithmetic number, because the mean of its divisors is an integer number (659411166).

Almost surely, 2^1318822331 is an apocalyptic number.

1318822331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318822331 is an equidigital number, since it uses as much as digits as its factorization.

1318822331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 1318822331 is about 36315.5934964582. The cubic root of 1318822331 is about 1096.6349868231.

The spelling of 1318822331 in words is "one billion, three hundred eighteen million, eight hundred twenty-two thousand, three hundred thirty-one".