981224281 has 4 divisors (see below), whose sum is σ = 981764352. Its totient is φ = 980684212.

The previous prime is 981224261. The next prime is 981224297. The reversal of 981224281 is 182422189.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 981224281 - 2⁵ = 981224249 is a prime.

It is a super-2 number, since 2×981224281² = 1925602179247933922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 981224281.

It is not an unprimeable number, because it can be changed into a prime (981224261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267301 + ... + 270946.

It is an arithmetic number, because the mean of its divisors is an integer number (245441088).

Almost surely, 2^981224281 is an apocalyptic number.

It is an amenable number.

981224281 is a deficient number, since it is larger than the sum of its proper divisors (540071).

981224281 is a wasteful number, since it uses less digits than its factorization.

981224281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540070.

The product of its digits is 18432, while the sum is 37.

The square root of 981224281 is about 31324.4996927325. The cubic root of 981224281 is about 993.7018435006.

The spelling of 981224281 in words is "nine hundred eighty-one million, two hundred twenty-four thousand, two hundred eighty-one".