228159720001 has 4 divisors (see below), whose sum is σ = 228163870404. Its totient is φ = 228155569600.

The previous prime is 228159719999. The next prime is 228159720011. The reversal of 228159720001 is 100027951822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173263230001 + 54896490000 = 416249^2 + 234300^2 .

It is a cyclic number.

It is not a de Polignac number, because 228159720001 - 2¹ = 228159719999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228159720011) 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, 1991620 + ... + 2103061.

It is an arithmetic number, because the mean of its divisors is an integer number (57040967601).

Almost surely, 2^228159720001 is an apocalyptic number.

It is an amenable number.

228159720001 is a deficient number, since it is larger than the sum of its proper divisors (4150403).

228159720001 is an equidigital number, since it uses as much as digits as its factorization.

228159720001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4150402.

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 228159720001 in words is "two hundred twenty-eight billion, one hundred fifty-nine million, seven hundred twenty thousand, one".