160016821 has 2 divisors, whose sum is σ = 160016822. Its totient is φ = 160016820.

The previous prime is 160016807. The next prime is 160016833. The reversal of 160016821 is 128610061.

160016821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144720900 + 15295921 = 12030^2 + 3911^2 .

It is an emirp because it is prime and its reverse (128610061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 160016821 - 2⁵ = 160016789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160016861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80008410 + 80008411.

It is an arithmetic number, because the mean of its divisors is an integer number (80008411).

Almost surely, 2^160016821 is an apocalyptic number.

It is an amenable number.

160016821 is a deficient number, since it is larger than the sum of its proper divisors (1).

160016821 is an equidigital number, since it uses as much as digits as its factorization.

160016821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 160016821 is about 12649.7755316053. The cubic root of 160016821 is about 542.9025473268.

Adding to 160016821 its reverse (128610061), we get a palindrome (288626882).

It can be divided in two parts, 16001 and 6821, that added together give a palindrome (22822).

The spelling of 160016821 in words is "one hundred sixty million, sixteen thousand, eight hundred twenty-one".