163505057 has 4 divisors (see below), whose sum is σ = 166983936. Its totient is φ = 160026180.

The previous prime is 163505047. The next prime is 163505059. The reversal of 163505057 is 750505361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163505057 - 2⁶ = 163504993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163505059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1739369 + ... + 1739462.

It is an arithmetic number, because the mean of its divisors is an integer number (41745984).

Almost surely, 2^163505057 is an apocalyptic number.

It is an amenable number.

163505057 is a deficient number, since it is larger than the sum of its proper divisors (3478879).

163505057 is an equidigital number, since it uses as much as digits as its factorization.

163505057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478878.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 163505057 is about 12786.9095953635. The cubic root of 163505057 is about 546.8191680340.

The spelling of 163505057 in words is "one hundred sixty-three million, five hundred five thousand, fifty-seven".