231766152133 has 4 divisors (see below), whose sum is σ = 231779599660. Its totient is φ = 231752704608.

The previous prime is 231766152113. The next prime is 231766152161. The reversal of 231766152133 is 331251667132.

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 108594634369 + 123171517764 = 329537^2 + 350958^2 .

It is a cyclic number.

It is not a de Polignac number, because 231766152133 - 2³³ = 223176217541 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 (231766152113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6697878 + ... + 6732391.

It is an arithmetic number, because the mean of its divisors is an integer number (57944899915).

Almost surely, 2^231766152133 is an apocalyptic number.

It is an amenable number.

231766152133 is a deficient number, since it is larger than the sum of its proper divisors (13447527).

231766152133 is a wasteful number, since it uses less digits than its factorization.

231766152133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13447526.

The product of its digits is 136080, while the sum is 40.

The spelling of 231766152133 in words is "two hundred thirty-one billion, seven hundred sixty-six million, one hundred fifty-two thousand, one hundred thirty-three".