231000132133 has 4 divisors (see below), whose sum is σ = 231027442348. Its totient is φ = 230972821920.

The previous prime is 231000132107. The next prime is 231000132179. The reversal of 231000132133 is 331231000132.

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 92926206244 + 138073925889 = 304838^2 + 371583^2 .

It is a cyclic number.

It is not a de Polignac number, because 231000132133 - 2³⁷ = 93561178661 is a prime.

It is a super-2 number, since 2×231000132133² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231000132133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231000132833) 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, 13642416 + ... + 13659337.

It is an arithmetic number, because the mean of its divisors is an integer number (57756860587).

Almost surely, 2^231000132133 is an apocalyptic number.

It is an amenable number.

231000132133 is a deficient number, since it is larger than the sum of its proper divisors (27310215).

231000132133 is an equidigital number, since it uses as much as digits as its factorization.

231000132133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27310214.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 231000132133 its reverse (331231000132), we get a palindrome (562231132265).

The spelling of 231000132133 in words is "two hundred thirty-one billion, one hundred thirty-two thousand, one hundred thirty-three".