215716631387273 has 2 divisors, whose sum is σ = 215716631387274. Its totient is φ = 215716631387272.

The previous prime is 215716631387263. The next prime is 215716631387287. The reversal of 215716631387273 is 372783136617512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126159329092489 + 89557302294784 = 11232067^2 + 9463472^2 .

It is a cyclic number.

It is not a de Polignac number, because 215716631387273 - 2¹² = 215716631383177 is a prime.

It is a super-2 number, since 2×215716631387273² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (215716631387233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107858315693636 + 107858315693637.

It is an arithmetic number, because the mean of its divisors is an integer number (107858315693637).

Almost surely, 2^{215716631387273} is an apocalyptic number.

It is an amenable number.

215716631387273 is a deficient number, since it is larger than the sum of its proper divisors (1).

215716631387273 is an equidigital number, since it uses as much as digits as its factorization.

215716631387273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53343360, while the sum is 62.

The spelling of 215716631387273 in words is "two hundred fifteen trillion, seven hundred sixteen billion, six hundred thirty-one million, three hundred eighty-seven thousand, two hundred seventy-three".