161575285 has 8 divisors (see below), whose sum is σ = 195175296. Its totient is φ = 128403600.

The previous prime is 161575279. The next prime is 161575289. The reversal of 161575285 is 582575161.

It is a happy number.

161575285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161575285 - 2³ = 161575277 is a prime.

It is a super-4 number, since 4×161575285⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161575289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106249 + ... + 107758.

It is an arithmetic number, because the mean of its divisors is an integer number (24396912).

Almost surely, 2^161575285 is an apocalyptic number.

It is an amenable number.

161575285 is a deficient number, since it is larger than the sum of its proper divisors (33600011).

161575285 is a wasteful number, since it uses less digits than its factorization.

161575285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214163.

The product of its digits is 84000, while the sum is 40.

The square root of 161575285 is about 12711.2267307290. The cubic root of 161575285 is about 544.6593668647.

The spelling of 161575285 in words is "one hundred sixty-one million, five hundred seventy-five thousand, two hundred eighty-five".