213013023281 has 2 divisors, whose sum is σ = 213013023282. Its totient is φ = 213013023280.

The previous prime is 213013023259. The next prime is 213013023329. The reversal of 213013023281 is 182320310312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170081183281 + 42931840000 = 412409^2 + 207200^2 .

It is a cyclic number.

It is not a de Polignac number, because 213013023281 - 2¹⁴ = 213013006897 is a prime.

It is a super-2 number, since 2×213013023281² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213013023281.

It is not a weakly prime, because it can be changed into another prime (213013023221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106506511640 + 106506511641.

It is an arithmetic number, because the mean of its divisors is an integer number (106506511641).

Almost surely, 2^213013023281 is an apocalyptic number.

It is an amenable number.

213013023281 is a deficient number, since it is larger than the sum of its proper divisors (1).

213013023281 is an equidigital number, since it uses as much as digits as its factorization.

213013023281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 213013023281 its reverse (182320310312), we get a palindrome (395333333593).

The spelling of 213013023281 in words is "two hundred thirteen billion, thirteen million, twenty-three thousand, two hundred eighty-one".