1123530212 has 18 divisors (see below), whose sum is σ = 2287186902. Its totient is φ = 481512864.

The previous prime is 1123530167. The next prime is 1123530217. The reversal of 1123530212 is 2120353211.

It can be written as a sum of positive squares in only one way, i.e., 1113957376 + 9572836 = 33376^2 + 3094^2 .

It is not an unprimeable number, because it can be changed into a prime (1123530217) 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, 2865953 + ... + 2866344.

It is an arithmetic number, because the mean of its divisors is an integer number (127065939).

Almost surely, 2^1123530212 is an apocalyptic number.

It is an amenable number.

1123530212 is an abundant number, since it is smaller than the sum of its proper divisors (1163656690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123530212 is a wasteful number, since it uses less digits than its factorization.

1123530212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5732315 (or 5732306 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1123530212 is about 33519.1021956138. The cubic root of 1123530212 is about 1039.5887834321.

Adding to 1123530212 its reverse (2120353211), we get a palindrome (3243883423).

The spelling of 1123530212 in words is "one billion, one hundred twenty-three million, five hundred thirty thousand, two hundred twelve".