1123530131 has 2 divisors, whose sum is σ = 1123530132. Its totient is φ = 1123530130.

The previous prime is 1123530127. The next prime is 1123530137. The reversal of 1123530131 is 1310353211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123530131 - 2² = 1123530127 is a prime.

It is a super-2 number, since 2×1123530131² = 2524639910529754322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123530137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561765065 + 561765066.

It is an arithmetic number, because the mean of its divisors is an integer number (561765066).

Almost surely, 2^1123530131 is an apocalyptic number.

1123530131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123530131 is an equidigital number, since it uses as much as digits as its factorization.

1123530131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1123530131 is about 33519.1009873475. The cubic root of 1123530131 is about 1039.5887584493.

Adding to 1123530131 its reverse (1310353211), we get a palindrome (2433883342).

The spelling of 1123530131 in words is "one billion, one hundred twenty-three million, five hundred thirty thousand, one hundred thirty-one".