229505288861 has 4 divisors (see below), whose sum is σ = 230706887424. Its totient is φ = 228303690300.

The previous prime is 229505288843. The next prime is 229505288923. The reversal of 229505288861 is 168882505922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 229505288861 - 2¹⁸ = 229505026717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 229505288797 and 229505288806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229505288261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600798995 + ... + 600799376.

It is an arithmetic number, because the mean of its divisors is an integer number (57676721856).

Almost surely, 2^229505288861 is an apocalyptic number.

It is an amenable number.

229505288861 is a deficient number, since it is larger than the sum of its proper divisors (1201598563).

229505288861 is a wasteful number, since it uses less digits than its factorization.

229505288861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201598562.

The product of its (nonzero) digits is 5529600, while the sum is 56.

The spelling of 229505288861 in words is "two hundred twenty-nine billion, five hundred five million, two hundred eighty-eight thousand, eight hundred sixty-one".