1131323225 has 12 divisors (see below), whose sum is σ = 1485361404. Its totient is φ = 851819520.

The previous prime is 1131323189. The next prime is 1131323243. The reversal of 1131323225 is 5223231311.

It can be written as a sum of positive squares in 6 ways, for example, as 27489049 + 1103834176 = 5243^2 + 33224^2 .

It is not a de Polignac number, because 1131323225 - 2⁶ = 1131323161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131323225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1330544 + ... + 1331393.

It is an arithmetic number, because the mean of its divisors is an integer number (123780117).

Almost surely, 2^1131323225 is an apocalyptic number.

It is an amenable number.

1131323225 is a deficient number, since it is larger than the sum of its proper divisors (354038179).

1131323225 is a wasteful number, since it uses less digits than its factorization.

1131323225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661964 (or 2661959 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 1131323225 is about 33635.1486543467. The cubic root of 1131323225 is about 1041.9868407434.

Adding to 1131323225 its reverse (5223231311), we get a palindrome (6354554536).

The spelling of 1131323225 in words is "one billion, one hundred thirty-one million, three hundred twenty-three thousand, two hundred twenty-five".