1115147381 has 2 divisors, whose sum is σ = 1115147382. Its totient is φ = 1115147380.

The previous prime is 1115147359. The next prime is 1115147441. The reversal of 1115147381 is 1837415111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109223025 + 5924356 = 33305^2 + 2434^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115147381 - 2²⁶ = 1048038517 is a prime.

It is a super-2 number, since 2×1115147381² = 2487107362702318322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115147311) 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, 557573690 + 557573691.

It is an arithmetic number, because the mean of its divisors is an integer number (557573691).

Almost surely, 2^1115147381 is an apocalyptic number.

It is an amenable number.

1115147381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115147381 is an equidigital number, since it uses as much as digits as its factorization.

1115147381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 32.

The square root of 1115147381 is about 33393.8224975818. The cubic root of 1115147381 is about 1036.9968159669.

The spelling of 1115147381 in words is "one billion, one hundred fifteen million, one hundred forty-seven thousand, three hundred eighty-one".