215343240487 has 2 divisors, whose sum is σ = 215343240488. Its totient is φ = 215343240486.

The previous prime is 215343240457. The next prime is 215343240523. The reversal of 215343240487 is 784042343512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215343240487 is a prime.

It is a super-2 number, since 2×215343240487² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215343240407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107671620243 + 107671620244.

It is an arithmetic number, because the mean of its divisors is an integer number (107671620244).

Almost surely, 2^215343240487 is an apocalyptic number.

215343240487 is a deficient number, since it is larger than the sum of its proper divisors (1).

215343240487 is an equidigital number, since it uses as much as digits as its factorization.

215343240487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 43.

Adding to 215343240487 its reverse (784042343512), we get a palindrome (999385583999).

The spelling of 215343240487 in words is "two hundred fifteen billion, three hundred forty-three million, two hundred forty thousand, four hundred eighty-seven".