160520221 has 4 divisors (see below), whose sum is σ = 160589052. Its totient is φ = 160451392.

The previous prime is 160520203. The next prime is 160520309. The reversal of 160520221 is 122025061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122025061 = 41 ⋅2976221.

It can be written as a sum of positive squares in 2 ways, for example, as 113103225 + 47416996 = 10635^2 + 6886^2 .

It is a cyclic number.

It is not a de Polignac number, because 160520221 - 2¹³ = 160512029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160560221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30790 + ... + 35623.

It is an arithmetic number, because the mean of its divisors is an integer number (40147263).

Almost surely, 2^160520221 is an apocalyptic number.

It is an amenable number.

160520221 is a deficient number, since it is larger than the sum of its proper divisors (68831).

160520221 is an equidigital number, since it uses as much as digits as its factorization.

160520221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68830.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 160520221 is about 12669.6574933974. The cubic root of 160520221 is about 543.4712605621.

Adding to 160520221 its reverse (122025061), we get a palindrome (282545282).

The spelling of 160520221 in words is "one hundred sixty million, five hundred twenty thousand, two hundred twenty-one".