229561 has 2 divisors, whose sum is σ = 229562. Its totient is φ = 229560.

The previous prime is 229553. The next prime is 229583. The reversal of 229561 is 165922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164025 + 65536 = 405^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 229561 - 2³ = 229553 is a prime.

It is not a weakly prime, because it can be changed into another prime (229591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114780 + 114781.

It is an arithmetic number, because the mean of its divisors is an integer number (114781).

2²²⁹⁵⁶¹ is an apocalyptic number.

It is an amenable number.

229561 is a deficient number, since it is larger than the sum of its proper divisors (1).

229561 is an equidigital number, since it uses as much as digits as its factorization.

229561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 25.

The square root of 229561 is about 479.1252445864. The cubic root of 229561 is about 61.2302504700.

The spelling of 229561 in words is "two hundred twenty-nine thousand, five hundred sixty-one".