1113155511 has 24 divisors (see below), whose sum is σ = 1633551696. Its totient is φ = 673770240.

The previous prime is 1113155509. The next prime is 1113155513. The reversal of 1113155511 is 1155513111.

It is an interprime number because it is at equal distance from previous prime (1113155509) and next prime (1113155513).

It is not a de Polignac number, because 1113155511 - 2¹ = 1113155509 is a prime.

It is a super-2 number, since 2×1113155511² = 2478230383339342242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113155513) 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 in 23 ways as a sum of consecutive naturals, for example, 12931 + ... + 48923.

It is an arithmetic number, because the mean of its divisors is an integer number (68064654).

Almost surely, 2^1113155511 is an apocalyptic number.

1113155511 is a deficient number, since it is larger than the sum of its proper divisors (520396185).

1113155511 is a wasteful number, since it uses less digits than its factorization.

1113155511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36083 (or 36070 counting only the distinct ones).

The product of its digits is 375, while the sum is 24.

The square root of 1113155511 is about 33363.9852385772. The cubic root of 1113155511 is about 1036.3790220211.

Adding to 1113155511 its reverse (1155513111), we get a palindrome (2268668622).

The spelling of 1113155511 in words is "one billion, one hundred thirteen million, one hundred fifty-five thousand, five hundred eleven".