213449237 has 2 divisors, whose sum is σ = 213449238. Its totient is φ = 213449236.

The previous prime is 213449219. The next prime is 213449261. The reversal of 213449237 is 732944312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171898321 + 41550916 = 13111^2 + 6446^2 .

It is a cyclic number.

It is not a de Polignac number, because 213449237 - 2¹⁶ = 213383701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213449197 and 213449206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213449437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106724618 + 106724619.

It is an arithmetic number, because the mean of its divisors is an integer number (106724619).

Almost surely, 2^213449237 is an apocalyptic number.

It is an amenable number.

213449237 is a deficient number, since it is larger than the sum of its proper divisors (1).

213449237 is an equidigital number, since it uses as much as digits as its factorization.

213449237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 213449237 is about 14609.9020188364. The cubic root of 213449237 is about 597.6288239587.

The spelling of 213449237 in words is "two hundred thirteen million, four hundred forty-nine thousand, two hundred thirty-seven".