163545531 has 8 divisors (see below), whose sum is σ = 219652944. Its totient is φ = 108234240.

The previous prime is 163545527. The next prime is 163545539. The reversal of 163545531 is 135545361.

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

It is not a de Polignac number, because 163545531 - 2² = 163545527 is a prime.

It is a super-2 number, since 2×163545531² = 53494281420143922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163545492 and 163545501.

It is not an unprimeable number, because it can be changed into a prime (163545539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198550 + ... + 199371.

It is an arithmetic number, because the mean of its divisors is an integer number (27456618).

Almost surely, 2^163545531 is an apocalyptic number.

163545531 is a deficient number, since it is larger than the sum of its proper divisors (56107413).

163545531 is a wasteful number, since it uses less digits than its factorization.

163545531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398061.

The product of its digits is 27000, while the sum is 33.

The square root of 163545531 is about 12788.4921316002. The cubic root of 163545531 is about 546.8642841372.

The spelling of 163545531 in words is "one hundred sixty-three million, five hundred forty-five thousand, five hundred thirty-one".