160720221 has 16 divisors (see below), whose sum is σ = 229832640. Its totient is φ = 99590400.

The previous prime is 160720211. The next prime is 160720223. The reversal of 160720221 is 122027061.

160720221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 160720221 - 2⁷ = 160720093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160720223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23580 + ... + 29621.

It is an arithmetic number, because the mean of its divisors is an integer number (14364540).

Almost surely, 2^160720221 is an apocalyptic number.

It is an amenable number.

160720221 is a deficient number, since it is larger than the sum of its proper divisors (69112419).

160720221 is a wasteful number, since it uses less digits than its factorization.

160720221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53276.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 160720221 is about 12677.5479095920. The cubic root of 160720221 is about 543.6968793661.

Adding to 160720221 its reverse (122027061), we get a palindrome (282747282).

The spelling of 160720221 in words is "one hundred sixty million, seven hundred twenty thousand, two hundred twenty-one".