215210244533281 has 2 divisors, whose sum is σ = 215210244533282. Its totient is φ = 215210244533280.

The previous prime is 215210244533183. The next prime is 215210244533321. The reversal of 215210244533281 is 182335442012512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214811819731600 + 398424801681 = 14656460^2 + 631209^2 .

It is a cyclic number.

It is not a de Polignac number, because 215210244533281 - 2²⁵ = 215210210978849 is a prime.

It is a super-2 number, since 2×215210244533281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (215210244531281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107605122266640 + 107605122266641.

It is an arithmetic number, because the mean of its divisors is an integer number (107605122266641).

Almost surely, 2^{215210244533281} is an apocalyptic number.

It is an amenable number.

215210244533281 is a deficient number, since it is larger than the sum of its proper divisors (1).

215210244533281 is an equidigital number, since it uses as much as digits as its factorization.

215210244533281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460800, while the sum is 43.

Adding to 215210244533281 its reverse (182335442012512), we get a palindrome (397545686545793).

The spelling of 215210244533281 in words is "two hundred fifteen trillion, two hundred ten billion, two hundred forty-four million, five hundred thirty-three thousand, two hundred eighty-one".