2115021751487 has 2 divisors, whose sum is σ = 2115021751488. Its totient is φ = 2115021751486.

The previous prime is 2115021751483. The next prime is 2115021751489. The reversal of 2115021751487 is 7841571205112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2115021751487 - 2² = 2115021751483 is a prime.

It is a super-2 number, since 2×2115021751487² (a number of 25 digits) contains 22 as substring.

Together with 2115021751489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2115021751483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057510875743 + 1057510875744.

It is an arithmetic number, because the mean of its divisors is an integer number (1057510875744).

Almost surely, 2^{2115021751487} is an apocalyptic number.

2115021751487 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115021751487 is an equidigital number, since it uses as much as digits as its factorization.

2115021751487 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 44.

Adding to 2115021751487 its reverse (7841571205112), we get a palindrome (9956592956599).

The spelling of 2115021751487 in words is "two trillion, one hundred fifteen billion, twenty-one million, seven hundred fifty-one thousand, four hundred eighty-seven".