1131310240 has 24 divisors (see below), whose sum is σ = 2672720820. Its totient is φ = 452524032.

The previous prime is 1131310207. The next prime is 1131310241. The reversal of 1131310240 is 420131311.

It can be written as a sum of positive squares in 2 ways, for example, as 1130842384 + 467856 = 33628^2 + 684^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1131310241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3535185 + ... + 3535504.

Almost surely, 2^1131310240 is an apocalyptic number.

1131310240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131310240 is an abundant number, since it is smaller than the sum of its proper divisors (1541410580).

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

1131310240 is an equidigital number, since it uses as much as digits as its factorization.

1131310240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070704 (or 7070696 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1131310240 is about 33634.9556265502. The cubic root of 1131310240 is about 1041.9828541872.

Adding to 1131310240 its reverse (420131311), we get a palindrome (1551441551).

The spelling of 1131310240 in words is "one billion, one hundred thirty-one million, three hundred ten thousand, two hundred forty".