163550505 has 16 divisors (see below), whose sum is σ = 261981504. Its totient is φ = 87126720.

The previous prime is 163550503. The next prime is 163550533. The reversal of 163550505 is 505055361.

It is not a de Polignac number, because 163550505 - 2¹ = 163550503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163550503) 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, 8322 + ... + 19908.

It is an arithmetic number, because the mean of its divisors is an integer number (16373844).

Almost surely, 2^163550505 is an apocalyptic number.

163550505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163550505 is a deficient number, since it is larger than the sum of its proper divisors (98430999).

163550505 is a wasteful number, since it uses less digits than its factorization.

163550505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12536.

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 163550505 is about 12788.6866018368. The cubic root of 163550505 is about 546.8698281089.

The spelling of 163550505 in words is "one hundred sixty-three million, five hundred fifty thousand, five hundred five".