228632131562221 has 16 divisors (see below), whose sum is σ = 243736977973248. Its totient is φ = 214000877574000.

The previous prime is 228632131562209. The next prime is 228632131562281. The reversal of 228632131562221 is 122265131236822.

It is a cyclic number.

It is not a de Polignac number, because 228632131562221 - 2⁹ = 228632131561709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228632131562201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491045725 + ... + 491511106.

It is an arithmetic number, because the mean of its divisors is an integer number (15233561123328).

Almost surely, 2^{228632131562221} is an apocalyptic number.

It is an amenable number.

228632131562221 is a deficient number, since it is larger than the sum of its proper divisors (15104846411027).

228632131562221 is a wasteful number, since it uses less digits than its factorization.

228632131562221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982557072.

The product of its digits is 829440, while the sum is 46.

The spelling of 228632131562221 in words is "two hundred twenty-eight trillion, six hundred thirty-two billion, one hundred thirty-one million, five hundred sixty-two thousand, two hundred twenty-one".