161675252 has 6 divisors (see below), whose sum is σ = 282931698. Its totient is φ = 80837624.

The previous prime is 161675243. The next prime is 161675273. The reversal of 161675252 is 252576161.

It can be written as a sum of positive squares in only one way, i.e., 120253156 + 41422096 = 10966^2 + 6436^2 .

It is a super-2 number, since 2×161675252² = 52277774218527008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20209403 + ... + 20209410.

It is an arithmetic number, because the mean of its divisors is an integer number (47155283).

Almost surely, 2^161675252 is an apocalyptic number.

It is an amenable number.

161675252 is a deficient number, since it is larger than the sum of its proper divisors (121256446).

161675252 is a wasteful number, since it uses less digits than its factorization.

161675252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40418817 (or 40418815 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 161675252 is about 12715.1583552860. The cubic root of 161675252 is about 544.7716710407.

Subtracting 161675252 from its reverse (252576161), we obtain a palindrome (90900909).

The spelling of 161675252 in words is "one hundred sixty-one million, six hundred seventy-five thousand, two hundred fifty-two".