123233565133 has 10 divisors (see below), whose sum is σ = 143763941134. Its totient is φ = 105628768056.

The previous prime is 123233565113. The next prime is 123233565163. The reversal of 123233565133 is 331565332321.

It can be written as a sum of positive squares in only one way, i.e., 64474350724 + 58759214409 = 253918^2 + 242403^2 .

It is a de Polignac number, because none of the positive numbers 2^k-123233565133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123233565092 and 123233565101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123233565113) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 25660566 + ... + 25665367.

Almost surely, 2^123233565133 is an apocalyptic number.

It is an amenable number.

123233565133 is a deficient number, since it is larger than the sum of its proper divisors (20530376001).

123233565133 is an frugal number, since it uses more digits than its factorization.

123233565133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51325961 (or 51325940 counting only the distinct ones).

The product of its digits is 145800, while the sum is 37.

Adding to 123233565133 its reverse (331565332321), we get a palindrome (454798897454).

The spelling of 123233565133 in words is "one hundred twenty-three billion, two hundred thirty-three million, five hundred sixty-five thousand, one hundred thirty-three".