215623532401247 has 2 divisors, whose sum is σ = 215623532401248. Its totient is φ = 215623532401246.

The previous prime is 215623532401229. The next prime is 215623532401273. The reversal of 215623532401247 is 742104235326512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215623532401247 - 2¹² = 215623532397151 is a prime.

It is a super-2 number, since 2×215623532401247² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215623532401297) 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, 107811766200623 + 107811766200624.

It is an arithmetic number, because the mean of its divisors is an integer number (107811766200624).

Almost surely, 2^{215623532401247} is an apocalyptic number.

215623532401247 is a deficient number, since it is larger than the sum of its proper divisors (1).

215623532401247 is an equidigital number, since it uses as much as digits as its factorization.

215623532401247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2419200, while the sum is 47.

Adding to 215623532401247 its reverse (742104235326512), we get a palindrome (957727767727759).

The spelling of 215623532401247 in words is "two hundred fifteen trillion, six hundred twenty-three billion, five hundred thirty-two million, four hundred one thousand, two hundred forty-seven".