160552721 has 4 divisors (see below), whose sum is σ = 183488832. Its totient is φ = 137616612.

The previous prime is 160552697. The next prime is 160552723. The reversal of 160552721 is 127255061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 127255061 = 739 ⋅172199.

It is a de Polignac number, because none of the positive numbers 2^k-160552721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (160552723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11468045 + ... + 11468058.

It is an arithmetic number, because the mean of its divisors is an integer number (45872208).

Almost surely, 2^160552721 is an apocalyptic number.

It is an amenable number.

160552721 is a deficient number, since it is larger than the sum of its proper divisors (22936111).

160552721 is an equidigital number, since it uses as much as digits as its factorization.

160552721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22936110.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 160552721 is about 12670.9400203773. The cubic root of 160552721 is about 543.5079363652.

The spelling of 160552721 in words is "one hundred sixty million, five hundred fifty-two thousand, seven hundred twenty-one".