1111531513 has 2 divisors, whose sum is σ = 1111531514. Its totient is φ = 1111531512.

The previous prime is 1111531489. The next prime is 1111531543. The reversal of 1111531513 is 3151351111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1072431504 + 39100009 = 32748^2 + 6253^2 .

It is an emirp because it is prime and its reverse (3151351111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111531513 - 2¹⁷ = 1111400441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111531543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555765756 + 555765757.

It is an arithmetic number, because the mean of its divisors is an integer number (555765757).

Almost surely, 2^1111531513 is an apocalyptic number.

It is an amenable number.

1111531513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111531513 is an equidigital number, since it uses as much as digits as its factorization.

1111531513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225, while the sum is 22.

The square root of 1111531513 is about 33339.6387652896. The cubic root of 1111531513 is about 1035.8747808213.

Adding to 1111531513 its reverse (3151351111), we get a palindrome (4262882624).

The spelling of 1111531513 in words is "one billion, one hundred eleven million, five hundred thirty-one thousand, five hundred thirteen".