1155115331 has 2 divisors, whose sum is σ = 1155115332. Its totient is φ = 1155115330.

The previous prime is 1155115271. The next prime is 1155115373. The reversal of 1155115331 is 1335115511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155115331 - 2¹⁴ = 1155098947 is a prime.

It is a super-2 number, since 2×1155115331² = 2668582855822479122, which contains 22 as substring.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 1155115331.

It is not a weakly prime, because it can be changed into another prime (1155115631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577557665 + 577557666.

It is an arithmetic number, because the mean of its divisors is an integer number (577557666).

Almost surely, 2^1155115331 is an apocalyptic number.

1155115331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155115331 is an equidigital number, since it uses as much as digits as its factorization.

1155115331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1125, while the sum is 26.

The square root of 1155115331 is about 33986.9876717546. The cubic root of 1155115331 is about 1049.2406697515.

The spelling of 1155115331 in words is "one billion, one hundred fifty-five million, one hundred fifteen thousand, three hundred thirty-one".