1131323144 has 32 divisors (see below), whose sum is σ = 2451513600. Its totient is φ = 479402880.

The previous prime is 1131323113. The next prime is 1131323161. The reversal of 1131323144 is 4413231311.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108512 + ... + 118479.

It is an arithmetic number, because the mean of its divisors is an integer number (76609800).

Almost surely, 2^1131323144 is an apocalyptic number.

1131323144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1131323144 is an abundant number, since it is smaller than the sum of its proper divisors (1320190456).

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

1131323144 is a wasteful number, since it uses less digits than its factorization.

1131323144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227093 (or 227089 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 1131323144 is about 33635.1474502491. The cubic root of 1131323144 is about 1041.9868158755.

Adding to 1131323144 its reverse (4413231311), we get a palindrome (5544554455).

The spelling of 1131323144 in words is "one billion, one hundred thirty-one million, three hundred twenty-three thousand, one hundred forty-four".