1125543131 has 2 divisors, whose sum is σ = 1125543132. Its totient is φ = 1125543130.

The previous prime is 1125543121. The next prime is 1125543137. The reversal of 1125543131 is 1313455211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1125543131 - 2¹⁰ = 1125542107 is a prime.

It is a super-2 number, since 2×1125543131² = 2533694679482566322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1125543131.

It is not a weakly prime, because it can be changed into another prime (1125543137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562771565 + 562771566.

It is an arithmetic number, because the mean of its divisors is an integer number (562771566).

Almost surely, 2^1125543131 is an apocalyptic number.

1125543131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125543131 is an equidigital number, since it uses as much as digits as its factorization.

1125543131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 26.

The square root of 1125543131 is about 33549.1152044283. The cubic root of 1125543131 is about 1040.2092561550.

Adding to 1125543131 its reverse (1313455211), we get a palindrome (2438998342).

The spelling of 1125543131 in words is "one billion, one hundred twenty-five million, five hundred forty-three thousand, one hundred thirty-one".