1131320444 has 12 divisors (see below), whose sum is σ = 1994055000. Its totient is φ = 561590448.

The previous prime is 1131320429. The next prime is 1131320459. The reversal of 1131320444 is 4440231311.

It is an interprime number because it is at equal distance from previous prime (1131320429) and next prime (1131320459).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1016819 + ... + 1017930.

It is an arithmetic number, because the mean of its divisors is an integer number (166171250).

Almost surely, 2^1131320444 is an apocalyptic number.

It is an amenable number.

1131320444 is a deficient number, since it is larger than the sum of its proper divisors (862734556).

1131320444 is a wasteful number, since it uses less digits than its factorization.

1131320444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034892 (or 2034890 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1131320444 is about 33635.1073136388. The cubic root of 1131320444 is about 1041.9859869444.

Adding to 1131320444 its reverse (4440231311), we get a palindrome (5571551755).

The spelling of 1131320444 in words is "one billion, one hundred thirty-one million, three hundred twenty thousand, four hundred forty-four".