281244164 has 12 divisors (see below), whose sum is σ = 492684864. Its totient is φ = 140477064.

The previous prime is 281244163. The next prime is 281244169. The reversal of 281244164 is 461442182.

It is a self number, because there is not a number n which added to its sum of digits gives 281244164.

It is not an unprimeable number, because it can be changed into a prime (281244163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31832 + ... + 39695.

It is an arithmetic number, because the mean of its divisors is an integer number (41057072).

Almost surely, 2^281244164 is an apocalyptic number.

It is an amenable number.

281244164 is a deficient number, since it is larger than the sum of its proper divisors (211440700).

281244164 is a wasteful number, since it uses less digits than its factorization.

281244164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72514 (or 72512 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 281244164 is about 16770.3358344429. The cubic root of 281244164 is about 655.1808167737.

The spelling of 281244164 in words is "two hundred eighty-one million, two hundred forty-four thousand, one hundred sixty-four".