228267132721156 has 6 divisors (see below), whose sum is σ = 399467482262030. Its totient is φ = 114133566360576.

The previous prime is 228267132721097. The next prime is 228267132721193. The reversal of 228267132721156 is 651127231762822.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 201162197783556 + 27104934937600 = 14183166^2 + 5206240^2 .

It is a junction number, because it is equal to n+sod(n) for n = 228267132721097 and 228267132721106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28533391590141 + ... + 28533391590148.

Almost surely, 2^{228267132721156} is an apocalyptic number.

It is an amenable number.

228267132721156 is a deficient number, since it is larger than the sum of its proper divisors (171200349540874).

228267132721156 is a wasteful number, since it uses less digits than its factorization.

228267132721156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57066783180293 (or 57066783180291 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 55.

The spelling of 228267132721156 in words is "two hundred twenty-eight trillion, two hundred sixty-seven billion, one hundred thirty-two million, seven hundred twenty-one thousand, one hundred fifty-six".