228131211392 has 216 divisors, whose sum is σ = 546709766085. Its totient is φ = 94544464896.

The previous prime is 228131211379. The next prime is 228131211431. The reversal of 228131211392 is 293112131822.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 184054728256 + 44076483136 = 429016^2 + 209944^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=337736.

It is a super-2 number, since 2×228131211392² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1399577903 + ... + 1399578065.

Almost surely, 2^228131211392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228131211392

228131211392 is an abundant number, since it is smaller than the sum of its proper divisors (318578554693).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228131211392 is an frugal number, since it uses more digits than its factorization.

228131211392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 209 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The spelling of 228131211392 in words is "two hundred twenty-eight billion, one hundred thirty-one million, two hundred eleven thousand, three hundred ninety-two".