1115215520 has 96 divisors (see below), whose sum is σ = 2720139408. Its totient is φ = 431751168.

The previous prime is 1115215501. The next prime is 1115215529. The reversal of 1115215520 is 255125111.

It can be written as a sum of positive squares in 8 ways, for example, as 1114758544 + 456976 = 33388^2 + 676^2 .

It is not an unprimeable number, because it can be changed into a prime (1115215529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1521074 + ... + 1521806.

Almost surely, 2^1115215520 is an apocalyptic number.

1115215520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115215520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1360069704).

1115215520 is an abundant number, since it is smaller than the sum of its proper divisors (1604923888).

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

1115215520 is a wasteful number, since it uses less digits than its factorization.

1115215520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 1115215520 is about 33394.8427156051. The cubic root of 1115215520 is about 1037.0179367885.

The spelling of 1115215520 in words is "one billion, one hundred fifteen million, two hundred fifteen thousand, five hundred twenty".