232128131 has 2 divisors, whose sum is σ = 232128132. Its totient is φ = 232128130.

The previous prime is 232128097. The next prime is 232128139. The reversal of 232128131 is 131821232.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232128131 is a prime.

It is a super-2 number, since 2×232128131² = 107766938403106322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 232128097 and 232128106.

It is not a weakly prime, because it can be changed into another prime (232128139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116064065 + 116064066.

It is an arithmetic number, because the mean of its divisors is an integer number (116064066).

Almost surely, 2^232128131 is an apocalyptic number.

232128131 is a deficient number, since it is larger than the sum of its proper divisors (1).

232128131 is an equidigital number, since it uses as much as digits as its factorization.

232128131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 232128131 is about 15235.7517372790. The cubic root of 232128131 is about 614.5764647286.

Adding to 232128131 its reverse (131821232), we get a palindrome (363949363).

The spelling of 232128131 in words is "two hundred thirty-two million, one hundred twenty-eight thousand, one hundred thirty-one".