1001115523 has 2 divisors, whose sum is σ = 1001115524. Its totient is φ = 1001115522.

The previous prime is 1001115497. The next prime is 1001115527. The reversal of 1001115523 is 3255111001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001115523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001115523.

It is not a weakly prime, because it can be changed into another prime (1001115527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500557761 + 500557762.

It is an arithmetic number, because the mean of its divisors is an integer number (500557762).

Almost surely, 2^1001115523 is an apocalyptic number.

1001115523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001115523 is an equidigital number, since it uses as much as digits as its factorization.

1001115523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1001115523 is about 31640.4096528474. The cubic root of 1001115523 is about 1000.3717028199.

Adding to 1001115523 its reverse (3255111001), we get a palindrome (4256226524).

The spelling of 1001115523 in words is "one billion, one million, one hundred fifteen thousand, five hundred twenty-three".