229521247 has 2 divisors, whose sum is σ = 229521248. Its totient is φ = 229521246.

The previous prime is 229521211. The next prime is 229521353. The reversal of 229521247 is 742125922.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 229521247 - 2²⁷ = 95303519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229524247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114760623 + 114760624.

It is an arithmetic number, because the mean of its divisors is an integer number (114760624).

Almost surely, 2^229521247 is an apocalyptic number.

229521247 is a deficient number, since it is larger than the sum of its proper divisors (1).

229521247 is an equidigital number, since it uses as much as digits as its factorization.

229521247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 229521247 is about 15149.9586468082. The cubic root of 229521247 is about 612.2671585882.

The spelling of 229521247 in words is "two hundred twenty-nine million, five hundred twenty-one thousand, two hundred forty-seven".