163538331 has 16 divisors (see below), whose sum is σ = 243408000. Its totient is φ = 96808320.

The previous prime is 163538267. The next prime is 163538341. The reversal of 163538331 is 133835361.

It is not a de Polignac number, because 163538331 - 2⁶ = 163538267 is a prime.

It is a super-2 number, since 2×163538331² = 53489571412531122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 163538292 and 163538301.

It is not an unprimeable number, because it can be changed into a prime (163538341) 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, 56206 + ... + 59043.

It is an arithmetic number, because the mean of its divisors is an integer number (15213000).

Almost surely, 2^163538331 is an apocalyptic number.

163538331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

163538331 is a deficient number, since it is larger than the sum of its proper divisors (79869669).

163538331 is a wasteful number, since it uses less digits than its factorization.

163538331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115306.

The product of its digits is 19440, while the sum is 33.

The square root of 163538331 is about 12788.2106254159. The cubic root of 163538331 is about 546.8562588886.

The spelling of 163538331 in words is "one hundred sixty-three million, five hundred thirty-eight thousand, three hundred thirty-one".