228912938569 has 4 divisors (see below), whose sum is σ = 261614786944. Its totient is φ = 196211090196.

The previous prime is 228912938563. The next prime is 228912938593. The reversal of 228912938569 is 965839219822.

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 a de Polignac number, because none of the positive numbers 2^k-228912938569 is a prime.

It is a super-2 number, since 2×228912938569² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228912938569.

It is not an unprimeable number, because it can be changed into a prime (228912938563) 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, 16350924177 + ... + 16350924190.

It is an arithmetic number, because the mean of its divisors is an integer number (65403696736).

Almost surely, 2^228912938569 is an apocalyptic number.

It is an amenable number.

228912938569 is a deficient number, since it is larger than the sum of its proper divisors (32701848375).

228912938569 is an equidigital number, since it uses as much as digits as its factorization.

228912938569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32701848374.

The product of its digits is 33592320, while the sum is 64.

The spelling of 228912938569 in words is "two hundred twenty-eight billion, nine hundred twelve million, nine hundred thirty-eight thousand, five hundred sixty-nine".