4443213161 has 2 divisors, whose sum is σ = 4443213162. Its totient is φ = 4443213160.

The previous prime is 4443213139. The next prime is 4443213169. The reversal of 4443213161 is 1613123444.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3402505561 + 1040707600 = 58331^2 + 32260^2 .

It is a cyclic number.

It is not a de Polignac number, because 4443213161 - 2¹⁴ = 4443196777 is a prime.

It is a super-2 number, since 2×4443213161² = 39484286388167223842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4443213169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2221606580 + 2221606581.

It is an arithmetic number, because the mean of its divisors is an integer number (2221606581).

Almost surely, 2^4443213161 is an apocalyptic number.

It is an amenable number.

4443213161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4443213161 is an equidigital number, since it uses as much as digits as its factorization.

4443213161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 4443213161 is about 66657.4314011574. The cubic root of 4443213161 is about 1643.9895385590.

The spelling of 4443213161 in words is "four billion, four hundred forty-three million, two hundred thirteen thousand, one hundred sixty-one".