161475505 has 8 divisors (see below), whose sum is σ = 193905000. Its totient is φ = 129090816.

The previous prime is 161475499. The next prime is 161475521. The reversal of 161475505 is 505574161.

It can be written as a sum of positive squares in 4 ways, for example, as 36192256 + 125283249 = 6016^2 + 11193^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 161475505 - 2¹⁵ = 161442737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2680 + ... + 18169.

It is an arithmetic number, because the mean of its divisors is an integer number (24238125).

Almost surely, 2^161475505 is an apocalyptic number.

It is an amenable number.

161475505 is a deficient number, since it is larger than the sum of its proper divisors (32429495).

161475505 is a wasteful number, since it uses less digits than its factorization.

161475505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22403.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 161475505 is about 12707.3012477079. The cubic root of 161475505 is about 544.5472265653.

The spelling of 161475505 in words is "one hundred sixty-one million, four hundred seventy-five thousand, five hundred five".