2115503503481 has 2 divisors, whose sum is σ = 2115503503482. Its totient is φ = 2115503503480.

The previous prime is 2115503503453. The next prime is 2115503503489. The reversal of 2115503503481 is 1843053055112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2106515515456 + 8987988025 = 1451384^2 + 94805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2115503503481 is a prime.

It is a super-2 number, since 2×2115503503481² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2115503503489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057751751740 + 1057751751741.

It is an arithmetic number, because the mean of its divisors is an integer number (1057751751741).

Almost surely, 2^{2115503503481} is an apocalyptic number.

It is an amenable number.

2115503503481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115503503481 is an equidigital number, since it uses as much as digits as its factorization.

2115503503481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 38.

Adding to 2115503503481 its reverse (1843053055112), we get a palindrome (3958556558593).

The spelling of 2115503503481 in words is "two trillion, one hundred fifteen billion, five hundred three million, five hundred three thousand, four hundred eighty-one".