215623532401273 has 2 divisors, whose sum is σ = 215623532401274. Its totient is φ = 215623532401272.

The previous prime is 215623532401247. The next prime is 215623532401279. The reversal of 215623532401273 is 372104235326512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184456680479289 + 31166851921984 = 13581483^2 + 5582728^2 .

It is a cyclic number.

It is not a de Polignac number, because 215623532401273 - 2³³ = 215614942466681 is a prime.

It is not a weakly prime, because it can be changed into another prime (215623532401279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107811766200636 + 107811766200637.

It is an arithmetic number, because the mean of its divisors is an integer number (107811766200637).

Almost surely, 2^{215623532401273} is an apocalyptic number.

It is an amenable number.

215623532401273 is a deficient number, since it is larger than the sum of its proper divisors (1).

215623532401273 is an equidigital number, since it uses as much as digits as its factorization.

215623532401273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 46.

Adding to 215623532401273 its reverse (372104235326512), we get a palindrome (587727767727785).

The spelling of 215623532401273 in words is "two hundred fifteen trillion, six hundred twenty-three billion, five hundred thirty-two million, four hundred one thousand, two hundred seventy-three".