163505051 has 4 divisors (see below), whose sum is σ = 172110600. Its totient is φ = 154899504.

The previous prime is 163505047. The next prime is 163505059. The reversal of 163505051 is 150505361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150505361 = 61 ⋅2467301.

It is a cyclic number.

It is not a de Polignac number, because 163505051 - 2² = 163505047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163505051.

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, 4302746 + ... + 4302783.

It is an arithmetic number, because the mean of its divisors is an integer number (43027650).

Almost surely, 2^163505051 is an apocalyptic number.

163505051 is a deficient number, since it is larger than the sum of its proper divisors (8605549).

163505051 is an equidigital number, since it uses as much as digits as its factorization.

163505051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8605548.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 163505051 is about 12786.9093607486. The cubic root of 163505051 is about 546.8191613453.

The spelling of 163505051 in words is "one hundred sixty-three million, five hundred five thousand, fifty-one".