163285481 has 2 divisors, whose sum is σ = 163285482. Its totient is φ = 163285480.

The previous prime is 163285469. The next prime is 163285483. The reversal of 163285481 is 184582361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143616256 + 19669225 = 11984^2 + 4435^2 .

It is a cyclic number.

It is not a de Polignac number, because 163285481 - 2¹⁸ = 163023337 is a prime.

It is a super-2 number, since 2×163285481² = 53324296610802722, which contains 22 as substring.

Together with 163285483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163285483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81642740 + 81642741.

It is an arithmetic number, because the mean of its divisors is an integer number (81642741).

Almost surely, 2^163285481 is an apocalyptic number.

It is an amenable number.

163285481 is a deficient number, since it is larger than the sum of its proper divisors (1).

163285481 is an equidigital number, since it uses as much as digits as its factorization.

163285481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 38.

The square root of 163285481 is about 12778.3207425702. The cubic root of 163285481 is about 546.5742782514.

The spelling of 163285481 in words is "one hundred sixty-three million, two hundred eighty-five thousand, four hundred eighty-one".