1113143081 has 2 divisors, whose sum is σ = 1113143082. Its totient is φ = 1113143080.

The previous prime is 1113143077. The next prime is 1113143099. The reversal of 1113143081 is 1803413111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1110222400 + 2920681 = 33320^2 + 1709^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113143081 - 2² = 1113143077 is a prime.

It is a super-2 number, since 2×1113143081² = 2478175037556345122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1113143981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556571540 + 556571541.

It is an arithmetic number, because the mean of its divisors is an integer number (556571541).

Almost surely, 2^1113143081 is an apocalyptic number.

It is an amenable number.

1113143081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113143081 is an equidigital number, since it uses as much as digits as its factorization.

1113143081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1113143081 is about 33363.7989593511. The cubic root of 1113143081 is about 1036.3751644471.

Adding to 1113143081 its reverse (1803413111), we get a palindrome (2916556192).

The spelling of 1113143081 in words is "one billion, one hundred thirteen million, one hundred forty-three thousand, eighty-one".