228267642217 has 4 divisors (see below), whose sum is σ = 233576192080. Its totient is φ = 222959092356.

The previous prime is 228267642193. The next prime is 228267642223. The reversal of 228267642217 is 712246762822.

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-228267642217 is a prime.

It is a super-2 number, since 2×228267642217² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228267642247) 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, 2654274867 + ... + 2654274952.

It is an arithmetic number, because the mean of its divisors is an integer number (58394048020).

Almost surely, 2^228267642217 is an apocalyptic number.

It is an amenable number.

228267642217 is a deficient number, since it is larger than the sum of its proper divisors (5308549863).

228267642217 is an equidigital number, since it uses as much as digits as its factorization.

228267642217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308549862.

The product of its digits is 1806336, while the sum is 49.

The spelling of 228267642217 in words is "two hundred twenty-eight billion, two hundred sixty-seven million, six hundred forty-two thousand, two hundred seventeen".