246443221 has 2 divisors, whose sum is σ = 246443222. Its totient is φ = 246443220.

The previous prime is 246443213. The next prime is 246443261. The reversal of 246443221 is 122344642.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221592996 + 24850225 = 14886^2 + 4985^2 .

It is a cyclic number.

It is not a de Polignac number, because 246443221 - 2³ = 246443213 is a prime.

It is a super-2 number, since 2×246443221² = 121468522353709682, which contains 22 as substring.

It is equal to p_13495240 and since 246443221 and 13495240 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 246443221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (246443261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123221610 + 123221611.

It is an arithmetic number, because the mean of its divisors is an integer number (123221611).

Almost surely, 2^246443221 is an apocalyptic number.

It is an amenable number.

246443221 is a deficient number, since it is larger than the sum of its proper divisors (1).

246443221 is an equidigital number, since it uses as much as digits as its factorization.

246443221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 28.

The square root of 246443221 is about 15698.5101522406. The cubic root of 246443221 is about 626.9587368670.

Adding to 246443221 its reverse (122344642), we get a palindrome (368787863).

The spelling of 246443221 in words is "two hundred forty-six million, four hundred forty-three thousand, two hundred twenty-one".