1131806525 has 6 divisors (see below), whose sum is σ = 1403440122. Its totient is φ = 905445200.

The previous prime is 1131806521. The next prime is 1131806593. The reversal of 1131806525 is 5256081311.

It can be written as a sum of positive squares in 3 ways, for example, as 116683204 + 1015123321 = 10802^2 + 31861^2 .

It is not a de Polignac number, because 1131806525 - 2² = 1131806521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131806491 and 1131806500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131806521) 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, 22636106 + ... + 22636155.

It is an arithmetic number, because the mean of its divisors is an integer number (233906687).

Almost surely, 2^1131806525 is an apocalyptic number.

It is an amenable number.

1131806525 is a deficient number, since it is larger than the sum of its proper divisors (271633597).

1131806525 is an equidigital number, since it uses as much as digits as its factorization.

1131806525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45272271 (or 45272266 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1131806525 is about 33642.3323359127. The cubic root of 1131806525 is about 1042.1351981520.

Adding to 1131806525 its reverse (5256081311), we get a palindrome (6387887836).

The spelling of 1131806525 in words is "one billion, one hundred thirty-one million, eight hundred six thousand, five hundred twenty-five".