215115027487 has 2 divisors, whose sum is σ = 215115027488. Its totient is φ = 215115027486.

The previous prime is 215115027409. The next prime is 215115027493. The reversal of 215115027487 is 784720511512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215115027487 - 2¹⁹ = 215114503199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215115027497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107557513743 + 107557513744.

It is an arithmetic number, because the mean of its divisors is an integer number (107557513744).

Almost surely, 2^215115027487 is an apocalyptic number.

215115027487 is a deficient number, since it is larger than the sum of its proper divisors (1).

215115027487 is an equidigital number, since it uses as much as digits as its factorization.

215115027487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156800, while the sum is 43.

Adding to 215115027487 its reverse (784720511512), we get a palindrome (999835538999).

The spelling of 215115027487 in words is "two hundred fifteen billion, one hundred fifteen million, twenty-seven thousand, four hundred eighty-seven".