1131400244 has 18 divisors (see below), whose sum is σ = 2143971270. Its totient is φ = 522184416.

The previous prime is 1131400243. The next prime is 1131400261. The reversal of 1131400244 is 4420041311.

It can be written as a sum of positive squares in 3 ways, for example, as 124099600 + 1007300644 = 11140^2 + 31738^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131400241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 836159 + ... + 837510.

It is an arithmetic number, because the mean of its divisors is an integer number (119109515).

Almost surely, 2^1131400244 is an apocalyptic number.

It is an amenable number.

1131400244 is a deficient number, since it is larger than the sum of its proper divisors (1012571026).

1131400244 is a wasteful number, since it uses less digits than its factorization.

1131400244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673699 (or 1673684 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1131400244 is about 33636.2935532439. The cubic root of 1131400244 is about 1042.0104859056.

Adding to 1131400244 its reverse (4420041311), we get a palindrome (5551441555).

The spelling of 1131400244 in words is "one billion, one hundred thirty-one million, four hundred thousand, two hundred forty-four".