13515045493 has 2 divisors, whose sum is σ = 13515045494. Its totient is φ = 13515045492.

The previous prime is 13515045437. The next prime is 13515045517. The reversal of 13515045493 is 39454051531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9335810884 + 4179234609 = 96622^2 + 64647^2 .

It is an emirp because it is prime and its reverse (39454051531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13515045493 - 2¹⁷ = 13514914421 is a prime.

It is a super-2 number, since 2×13515045493² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13515075493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6757522746 + 6757522747.

It is an arithmetic number, because the mean of its divisors is an integer number (6757522747).

Almost surely, 2^13515045493 is an apocalyptic number.

It is an amenable number.

13515045493 is a deficient number, since it is larger than the sum of its proper divisors (1).

13515045493 is an equidigital number, since it uses as much as digits as its factorization.

13515045493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 13515045493 in words is "thirteen billion, five hundred fifteen million, forty-five thousand, four hundred ninety-three".