215256755089 has 2 divisors, whose sum is σ = 215256755090. Its totient is φ = 215256755088.

The previous prime is 215256755053. The next prime is 215256755137. The reversal of 215256755089 is 980557652512.

215256755089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158231315089 + 57025440000 = 397783^2 + 238800^2 .

It is a cyclic number.

It is not a de Polignac number, because 215256755089 - 2³⁵ = 180897016721 is a prime.

It is a super-2 number, since 2×215256755089² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (215256755009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107628377544 + 107628377545.

It is an arithmetic number, because the mean of its divisors is an integer number (107628377545).

Almost surely, 2^215256755089 is an apocalyptic number.

It is an amenable number.

215256755089 is a deficient number, since it is larger than the sum of its proper divisors (1).

215256755089 is an equidigital number, since it uses as much as digits as its factorization.

215256755089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560000, while the sum is 55.

The spelling of 215256755089 in words is "two hundred fifteen billion, two hundred fifty-six million, seven hundred fifty-five thousand, eighty-nine".