281630163 has 6 divisors (see below), whose sum is σ = 375545644. Its totient is φ = 187734064.

The previous prime is 281630137. The next prime is 281630171. The reversal of 281630163 is 361036182.

It is not a de Polignac number, because 281630163 - 2¹² = 281626067 is a prime.

It is a super-2 number, since 2×281630163² = 158631097422813138, 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 281630163.

It is not an unprimeable number, because it can be changed into a prime (281630123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24223 + ... + 33911.

Almost surely, 2^281630163 is an apocalyptic number.

281630163 is a deficient number, since it is larger than the sum of its proper divisors (93915481).

281630163 is an frugal number, since it uses more digits than its factorization.

281630163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19381 (or 9692 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 281630163 is about 16781.8402745349. The cubic root of 281630163 is about 655.4804182847.

The spelling of 281630163 in words is "two hundred eighty-one million, six hundred thirty thousand, one hundred sixty-three".