163181361 has 16 divisors (see below), whose sum is σ = 248952704. Its totient is φ = 93135744.

The previous prime is 163181339. The next prime is 163181371.

163181361 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 163181361 - 2¹⁰ = 163180337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163181311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15531 + ... + 23823.

It is an arithmetic number, because the mean of its divisors is an integer number (15559544).

Almost surely, 2^163181361 is an apocalyptic number.

It is an amenable number.

163181361 is a deficient number, since it is larger than the sum of its proper divisors (85771343).

163181361 is an equidigital number, since it uses as much as digits as its factorization.

163181361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9240.

The product of its digits is 2592, while the sum is 30.

The square root of 163181361 is about 12774.2460051464. The cubic root of 163181361 is about 546.4580780561.

The spelling of 163181361 in words is "one hundred sixty-three million, one hundred eighty-one thousand, three hundred sixty-one".