213000521 has 2 divisors, whose sum is σ = 213000522. Its totient is φ = 213000520.

The previous prime is 213000517. The next prime is 213000547. The reversal of 213000521 is 125000312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171217225 + 41783296 = 13085^2 + 6464^2 .

It is a cyclic number.

It is not a de Polignac number, because 213000521 - 2² = 213000517 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213000496 and 213000505.

It is not a weakly prime, because it can be changed into another prime (213000121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106500260 + 106500261.

It is an arithmetic number, because the mean of its divisors is an integer number (106500261).

Almost surely, 2^213000521 is an apocalyptic number.

It is an amenable number.

213000521 is a deficient number, since it is larger than the sum of its proper divisors (1).

213000521 is an equidigital number, since it uses as much as digits as its factorization.

213000521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 213000521 is about 14594.5373684814. The cubic root of 213000521 is about 597.2097489087.

Adding to 213000521 its reverse (125000312), we get a palindrome (338000833).

The spelling of 213000521 in words is "two hundred thirteen million, five hundred twenty-one", and thus it is an aban number.