215603954589097 has 2 divisors, whose sum is σ = 215603954589098. Its totient is φ = 215603954589096.

The previous prime is 215603954589083. The next prime is 215603954589157. The reversal of 215603954589097 is 790985459306512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109952609817241 + 105651344771856 = 10485829^2 + 10278684^2 .

It is a cyclic number.

It is not a de Polignac number, because 215603954589097 - 2²⁷ = 215603820371369 is a prime.

It is a super-2 number, since 2×215603954589097² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (215603954589047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107801977294548 + 107801977294549.

It is an arithmetic number, because the mean of its divisors is an integer number (107801977294549).

It is a 1-persistent number, because it is pandigital, but 2⋅215603954589097 = 431207909178194 is not.

Almost surely, 2^{215603954589097} is an apocalyptic number.

It is an amenable number.

215603954589097 is a deficient number, since it is larger than the sum of its proper divisors (1).

215603954589097 is an equidigital number, since it uses as much as digits as its factorization.

215603954589097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832000, while the sum is 73.

The spelling of 215603954589097 in words is "two hundred fifteen trillion, six hundred three billion, nine hundred fifty-four million, five hundred eighty-nine thousand, ninety-seven".