163320531 has 8 divisors (see below), whose sum is σ = 237557184. Its totient is φ = 98982120.

The previous prime is 163320527. The next prime is 163320533. The reversal of 163320531 is 135023361.

It is a happy number.

163320531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163320531 - 2² = 163320527 is a prime.

It is a super-2 number, since 2×163320531² = 53347191692243922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163320533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2474521 + ... + 2474586.

It is an arithmetic number, because the mean of its divisors is an integer number (29694648).

Almost surely, 2^163320531 is an apocalyptic number.

163320531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

163320531 is a deficient number, since it is larger than the sum of its proper divisors (74236653).

163320531 is a wasteful number, since it uses less digits than its factorization.

163320531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4949121.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 163320531 is about 12779.6921324420. The cubic root of 163320531 is about 546.6133837039.

Adding to 163320531 its reverse (135023361), we get a palindrome (298343892).

The spelling of 163320531 in words is "one hundred sixty-three million, three hundred twenty thousand, five hundred thirty-one".