1131011520 has 112 divisors (see below), whose sum is σ = 3658880160. Its totient is φ = 295899136.

The previous prime is 1131011501. The next prime is 1131011549. The reversal of 1131011520 is 251101311.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1131011520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39766 + ... + 61994.

Almost surely, 2^1131011520 is an apocalyptic number.

1131011520 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 1131011520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1829440080).

1131011520 is an abundant number, since it is smaller than the sum of its proper divisors (2527868640).

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

1131011520 is a wasteful number, since it uses less digits than its factorization.

1131011520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22302 (or 22292 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 1131011520 is about 33630.5147150620. The cubic root of 1131011520 is about 1041.8911350144.

Adding to 1131011520 its reverse (251101311), we get a palindrome (1382112831).

The spelling of 1131011520 in words is "one billion, one hundred thirty-one million, eleven thousand, five hundred twenty".