213246641 has 2 divisors, whose sum is σ = 213246642. Its totient is φ = 213246640.

The previous prime is 213246637. The next prime is 213246679. The reversal of 213246641 is 146642312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151388416 + 61858225 = 12304^2 + 7865^2 .

It is a cyclic number.

It is not a de Polignac number, because 213246641 - 2² = 213246637 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213246611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106623320 + 106623321.

It is an arithmetic number, because the mean of its divisors is an integer number (106623321).

Almost surely, 2^213246641 is an apocalyptic number.

It is an amenable number.

213246641 is a deficient number, since it is larger than the sum of its proper divisors (1).

213246641 is an equidigital number, since it uses as much as digits as its factorization.

213246641 is an odious number, because the sum of its binary digits is odd.

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

The square root of 213246641 is about 14602.9668560878. The cubic root of 213246641 is about 597.4396836927.

Adding to 213246641 its reverse (146642312), we get a palindrome (359888953).

The spelling of 213246641 in words is "two hundred thirteen million, two hundred forty-six thousand, six hundred forty-one".