281996318220516 has 243 divisors, whose sum is σ = 744367227688539. Its totient is φ = 90013417502976.

The previous prime is 281996318220443. The next prime is 281996318220523. The reversal of 281996318220516 is 615022813699182.

The square root of 281996318220516 is 16792746.

It is a perfect power (a square), and thus also a powerful number.

281996318220516 is a `hidden beast` number, since 2 + 8 + 1 + 9 + 9 + 6 + 31 + 82 + 2 + 0 + 516 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 337433192100 + 281658885028416 = 580890^2 + 16782696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 249775303440 + ... + 249775304568.

Almost surely, 2^{281996318220516} is an apocalyptic number.

281996318220516 is the 16792746-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281996318220516

281996318220516 is an abundant number, since it is smaller than the sum of its proper divisors (462370909468023).

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

281996318220516 is an equidigital number, since it uses as much as digits as its factorization.

281996318220516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 281996318220516 in words is "two hundred eighty-one trillion, nine hundred ninety-six billion, three hundred eighteen million, two hundred twenty thousand, five hundred sixteen".