229363921 has 2 divisors, whose sum is σ = 229363922. Its totient is φ = 229363920.

The previous prime is 229363819. The next prime is 229363933. The reversal of 229363921 is 129363922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225000000 + 4363921 = 15000^2 + 2089^2 .

It is a cyclic number.

It is not a de Polignac number, because 229363921 - 2²¹ = 227266769 is a prime.

It is not a weakly prime, because it can be changed into another prime (224363921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114681960 + 114681961.

It is an arithmetic number, because the mean of its divisors is an integer number (114681961).

Almost surely, 2^229363921 is an apocalyptic number.

It is an amenable number.

229363921 is a deficient number, since it is larger than the sum of its proper divisors (1).

229363921 is an equidigital number, since it uses as much as digits as its factorization.

229363921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 37.

The square root of 229363921 is about 15144.7654653349. The cubic root of 229363921 is about 612.1272331833.

Subtracting from 229363921 its reverse (129363922), we obtain a palindrome (99999999).

The spelling of 229363921 in words is "two hundred twenty-nine million, three hundred sixty-three thousand, nine hundred twenty-one".