1131223340 has 48 divisors (see below), whose sum is σ = 2561337408. Its totient is φ = 417187584.

The previous prime is 1131223321. The next prime is 1131223363. The reversal of 1131223340 is 433221311.

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

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, 274334 + ... + 278426.

It is an arithmetic number, because the mean of its divisors is an integer number (53361196).

Almost surely, 2^1131223340 is an apocalyptic number.

1131223340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131223340 is an abundant number, since it is smaller than the sum of its proper divisors (1430114068).

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

1131223340 is a wasteful number, since it uses less digits than its factorization.

1131223340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5178 (or 5176 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1131223340 is about 33633.6637909104. The cubic root of 1131223340 is about 1041.9561740231.

Adding to 1131223340 its reverse (433221311), we get a palindrome (1564444651).

The spelling of 1131223340 in words is "one billion, one hundred thirty-one million, two hundred twenty-three thousand, three hundred forty".