13542411521 has 2 divisors, whose sum is σ = 13542411522. Its totient is φ = 13542411520.

The previous prime is 13542411511. The next prime is 13542411593. The reversal of 13542411521 is 12511424531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7295722225 + 6246689296 = 85415^2 + 79036^2 .

It is a cyclic number.

It is not a de Polignac number, because 13542411521 - 2⁶ = 13542411457 is a prime.

It is a super-2 number, since 2×13542411521² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13542411511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6771205760 + 6771205761.

It is an arithmetic number, because the mean of its divisors is an integer number (6771205761).

Almost surely, 2^13542411521 is an apocalyptic number.

It is an amenable number.

13542411521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13542411521 is an equidigital number, since it uses as much as digits as its factorization.

13542411521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 29.

The spelling of 13542411521 in words is "thirteen billion, five hundred forty-two million, four hundred eleven thousand, five hundred twenty-one".