1123534213 has 4 divisors (see below), whose sum is σ = 1124009260. Its totient is φ = 1123059168.

The previous prime is 1123534127. The next prime is 1123534241. The reversal of 1123534213 is 3124353211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 546717924 + 576816289 = 23382^2 + 24017^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123534213 - 2¹³ = 1123526021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123534283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233958 + ... + 238711.

It is an arithmetic number, because the mean of its divisors is an integer number (281002315).

Almost surely, 2^1123534213 is an apocalyptic number.

It is an amenable number.

1123534213 is a deficient number, since it is larger than the sum of its proper divisors (475047).

1123534213 is an equidigital number, since it uses as much as digits as its factorization.

1123534213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475046.

The product of its digits is 2160, while the sum is 25.

The square root of 1123534213 is about 33519.1618779468. The cubic root of 1123534213 is about 1039.5900174561.

Adding to 1123534213 its reverse (3124353211), we get a palindrome (4247887424).

The spelling of 1123534213 in words is "one billion, one hundred twenty-three million, five hundred thirty-four thousand, two hundred thirteen".