160821115 has 16 divisors (see below), whose sum is σ = 237521088. Its totient is φ = 101794176.

The previous prime is 160821113. The next prime is 160821119. The reversal of 160821115 is 511128061.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 160821115 - 2¹ = 160821113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 160821115.

It is not an unprimeable number, because it can be changed into a prime (160821113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176272 + ... + 177181.

It is an arithmetic number, because the mean of its divisors is an integer number (14845068).

Almost surely, 2^160821115 is an apocalyptic number.

160821115 is a deficient number, since it is larger than the sum of its proper divisors (76699973).

160821115 is a wasteful number, since it uses less digits than its factorization.

160821115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353478.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 160821115 is about 12681.5265248313. The cubic root of 160821115 is about 543.8106262608.

Adding to 160821115 its reverse (511128061), we get a palindrome (671949176).

It can be divided in two parts, 1608 and 21115, that multiplied together give a triangular number (33952920 = T₈₂₄₀).

The spelling of 160821115 in words is "one hundred sixty million, eight hundred twenty-one thousand, one hundred fifteen".