281971264 has 21 divisors (see below), whose sum is σ = 559803427. Its totient is φ = 140918464.

The previous prime is 281971243. The next prime is 281971279. The reversal of 281971264 is 462179182.

The square root of 281971264 is 16792.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 133287 + ... + 135385.

Almost surely, 2^281971264 is an apocalyptic number.

281971264 is the 16792-nd square number.

It is an amenable number.

281971264 is a deficient number, since it is larger than the sum of its proper divisors (277832163).

281971264 is an frugal number, since it uses more digits than its factorization.

281971264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210 (or 2101 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The cubic root of 281971264 is about 655.7449434788.

The spelling of 281971264 in words is "two hundred eighty-one million, nine hundred seventy-one thousand, two hundred sixty-four".