213556529 has 2 divisors, whose sum is σ = 213556530. Its totient is φ = 213556528.

The previous prime is 213556517. The next prime is 213556571. The reversal of 213556529 is 925655312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135675904 + 77880625 = 11648^2 + 8825^2 .

It is a cyclic number.

It is not a de Polignac number, because 213556529 - 2¹⁶ = 213490993 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213556492 and 213556501.

It is not a weakly prime, because it can be changed into another prime (213556429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106778264 + 106778265.

It is an arithmetic number, because the mean of its divisors is an integer number (106778265).

Almost surely, 2^213556529 is an apocalyptic number.

It is an amenable number.

213556529 is a deficient number, since it is larger than the sum of its proper divisors (1).

213556529 is an equidigital number, since it uses as much as digits as its factorization.

213556529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 38.

The square root of 213556529 is about 14613.5734507341. The cubic root of 213556529 is about 597.7289415199.

The spelling of 213556529 in words is "two hundred thirteen million, five hundred fifty-six thousand, five hundred twenty-nine".