160043621 has 2 divisors, whose sum is σ = 160043622. Its totient is φ = 160043620.

The previous prime is 160043599. The next prime is 160043647. The reversal of 160043621 is 126340061.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153412996 + 6630625 = 12386^2 + 2575^2 .

It is a cyclic number.

It is not a de Polignac number, because 160043621 - 2⁶ = 160043557 is a prime.

It is a super-2 number, since 2×160043621² = 51227921245583282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160043021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80021810 + 80021811.

It is an arithmetic number, because the mean of its divisors is an integer number (80021811).

Almost surely, 2^160043621 is an apocalyptic number.

It is an amenable number.

160043621 is a deficient number, since it is larger than the sum of its proper divisors (1).

160043621 is an equidigital number, since it uses as much as digits as its factorization.

160043621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 160043621 is about 12650.8347945896. The cubic root of 160043621 is about 542.9328545074.

Adding to 160043621 its reverse (126340061), we get a palindrome (286383682).

The spelling of 160043621 in words is "one hundred sixty million, forty-three thousand, six hundred twenty-one".