163284381 has 12 divisors (see below), whose sum is σ = 253998108. Its totient is φ = 100482624.

The previous prime is 163284379. The next prime is 163284403. The reversal of 163284381 is 183482361.

It can be written as a sum of positive squares in 2 ways, for example, as 9400356 + 153884025 = 3066^2 + 12405^2 .

It is not a de Polignac number, because 163284381 - 2¹ = 163284379 is a prime.

It is a super-2 number, since 2×163284381² = 53323578157106322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163284301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 697680 + ... + 697913.

It is an arithmetic number, because the mean of its divisors is an integer number (21166509).

Almost surely, 2^163284381 is an apocalyptic number.

It is an amenable number.

163284381 is a deficient number, since it is larger than the sum of its proper divisors (90713727).

163284381 is a wasteful number, since it uses less digits than its factorization.

163284381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395612 (or 1395609 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 163284381 is about 12778.2777008484. The cubic root of 163284381 is about 546.5730508856.

The spelling of 163284381 in words is "one hundred sixty-three million, two hundred eighty-four thousand, three hundred eighty-one".