1131133520 has 80 divisors (see below), whose sum is σ = 2874191040. Its totient is φ = 410572800.

The previous prime is 1131133481. The next prime is 1131133547. The reversal of 1131133520 is 253311311.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1131133492 and 1131133501.

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, 774551 + ... + 776009.

It is an arithmetic number, because the mean of its divisors is an integer number (35927388).

Almost surely, 2^1131133520 is an apocalyptic number.

1131133520 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 1131133520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437095520).

1131133520 is an abundant number, since it is smaller than the sum of its proper divisors (1743057520).

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

1131133520 is a wasteful number, since it uses less digits than its factorization.

1131133520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364 (or 2358 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1131133520 is about 33632.3284950656. The cubic root of 1131133520 is about 1041.9285959203.

Adding to 1131133520 its reverse (253311311), we get a palindrome (1384444831).

The spelling of 1131133520 in words is "one billion, one hundred thirty-one million, one hundred thirty-three thousand, five hundred twenty".