231873529 has 2 divisors, whose sum is σ = 231873530. Its totient is φ = 231873528.

The previous prime is 231873517. The next prime is 231873539. The reversal of 231873529 is 925378132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228705129 + 3168400 = 15123^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 231873529 - 2²⁵ = 198319097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231873491 and 231873500.

It is not a weakly prime, because it can be changed into another prime (231873539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115936764 + 115936765.

It is an arithmetic number, because the mean of its divisors is an integer number (115936765).

Almost surely, 2^231873529 is an apocalyptic number.

It is an amenable number.

231873529 is a deficient number, since it is larger than the sum of its proper divisors (1).

231873529 is an equidigital number, since it uses as much as digits as its factorization.

231873529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 231873529 is about 15227.3940318099. The cubic root of 231873529 is about 614.3516899624.

The spelling of 231873529 in words is "two hundred thirty-one million, eight hundred seventy-three thousand, five hundred twenty-nine".