229131977 has 2 divisors, whose sum is σ = 229131978. Its totient is φ = 229131976.

The previous prime is 229131971. The next prime is 229131989. The reversal of 229131977 is 779131922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226833721 + 2298256 = 15061^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 229131977 - 2⁶ = 229131913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (229131971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114565988 + 114565989.

It is an arithmetic number, because the mean of its divisors is an integer number (114565989).

Almost surely, 2^229131977 is an apocalyptic number.

It is an amenable number.

229131977 is a deficient number, since it is larger than the sum of its proper divisors (1).

229131977 is an equidigital number, since it uses as much as digits as its factorization.

229131977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 41.

The square root of 229131977 is about 15137.1059651441. The cubic root of 229131977 is about 611.9208259390.

Subtracting 229131977 from its reverse (779131922), we obtain a palindrome (549999945).

The spelling of 229131977 in words is "two hundred twenty-nine million, one hundred thirty-one thousand, nine hundred seventy-seven".