1115512144 has 40 divisors (see below), whose sum is σ = 2333064960. Its totient is φ = 515104128.

The previous prime is 1115512141. The next prime is 1115512163. The reversal of 1115512144 is 4412155111.

It is a happy number.

It is a super-2 number, since 2×1115512144² = 2488734686822953472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115512141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41592 + ... + 62935.

It is an arithmetic number, because the mean of its divisors is an integer number (58326624).

Almost surely, 2^1115512144 is an apocalyptic number.

It is an amenable number.

1115512144 is an abundant number, since it is smaller than the sum of its proper divisors (1217552816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1115512144 is a wasteful number, since it uses less digits than its factorization.

1115512144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104587 (or 104581 counting only the distinct ones).

The product of its digits is 800, while the sum is 25.

The square root of 1115512144 is about 33399.2835851310. The cubic root of 1115512144 is about 1037.1098703311.

Adding to 1115512144 its reverse (4412155111), we get a palindrome (5527667255).

The spelling of 1115512144 in words is "one billion, one hundred fifteen million, five hundred twelve thousand, one hundred forty-four".