231422129 has 2 divisors, whose sum is σ = 231422130. Its totient is φ = 231422128.

The previous prime is 231422123. The next prime is 231422167. The reversal of 231422129 is 921224132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135675904 + 95746225 = 11648^2 + 9785^2 .

It is a cyclic number.

It is not a de Polignac number, because 231422129 - 2²⁰ = 230373553 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 231422098 and 231422107.

It is not a weakly prime, because it can be changed into another prime (231422123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115711064 + 115711065.

It is an arithmetic number, because the mean of its divisors is an integer number (115711065).

Almost surely, 2^231422129 is an apocalyptic number.

It is an amenable number.

231422129 is a deficient number, since it is larger than the sum of its proper divisors (1).

231422129 is an equidigital number, since it uses as much as digits as its factorization.

231422129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 231422129 is about 15212.5648396317. The cubic root of 231422129 is about 613.9527677489.

The spelling of 231422129 in words is "two hundred thirty-one million, four hundred twenty-two thousand, one hundred twenty-nine".