231879229 has 2 divisors, whose sum is σ = 231879230. Its totient is φ = 231879228.

The previous prime is 231879227. The next prime is 231879251. The reversal of 231879229 is 922978132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230128900 + 1750329 = 15170^2 + 1323^2 .

It is a cyclic number.

It is not a de Polignac number, because 231879229 - 2¹ = 231879227 is a prime.

Together with 231879227, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231879223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115939614 + 115939615.

It is an arithmetic number, because the mean of its divisors is an integer number (115939615).

Almost surely, 2^231879229 is an apocalyptic number.

It is an amenable number.

231879229 is a deficient number, since it is larger than the sum of its proper divisors (1).

231879229 is an equidigital number, since it uses as much as digits as its factorization.

231879229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 231879229 is about 15227.5811933478. The cubic root of 231879229 is about 614.3567239939.

The spelling of 231879229 in words is "two hundred thirty-one million, eight hundred seventy-nine thousand, two hundred twenty-nine".