43221601 has 2 divisors, whose sum is σ = 43221602. Its totient is φ = 43221600.

The previous prime is 43221589. The next prime is 43221613. The reversal of 43221601 is 10612234.

It is a balanced prime because it is at equal distance from previous prime (43221589) and next prime (43221613).

It can be written as a sum of positive squares in only one way, i.e., 39125025 + 4096576 = 6255^2 + 2024^2 .

It is a cyclic number.

It is not a de Polignac number, because 43221601 - 2¹⁵ = 43188833 is a prime.

It is not a weakly prime, because it can be changed into another prime (43221631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21610800 + 21610801.

It is an arithmetic number, because the mean of its divisors is an integer number (21610801).

Almost surely, 2^43221601 is an apocalyptic number.

It is an amenable number.

43221601 is a deficient number, since it is larger than the sum of its proper divisors (1).

43221601 is an equidigital number, since it uses as much as digits as its factorization.

43221601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 43221601 is about 6574.3137284434. The cubic root of 43221601 is about 350.9406019028.

Adding to 43221601 its reverse (10612234), we get a palindrome (53833835).

The spelling of 43221601 in words is "forty-three million, two hundred twenty-one thousand, six hundred one".