229279621 has 2 divisors, whose sum is σ = 229279622. Its totient is φ = 229279620.

The previous prime is 229279607. The next prime is 229279637. The reversal of 229279621 is 126972922.

229279621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201242596 + 28037025 = 14186^2 + 5295^2 .

It is a cyclic number.

It is not a de Polignac number, because 229279621 - 2¹⁹ = 228755333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229279601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114639810 + 114639811.

It is an arithmetic number, because the mean of its divisors is an integer number (114639811).

Almost surely, 2^229279621 is an apocalyptic number.

It is an amenable number.

229279621 is a deficient number, since it is larger than the sum of its proper divisors (1).

229279621 is an equidigital number, since it uses as much as digits as its factorization.

229279621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 229279621 is about 15141.9820697292. The cubic root of 229279621 is about 612.0522306157.

The spelling of 229279621 in words is "two hundred twenty-nine million, two hundred seventy-nine thousand, six hundred twenty-one".