13531140521 has 4 divisors (see below), whose sum is σ = 13558699344. Its totient is φ = 13503581700.

The previous prime is 13531140517. The next prime is 13531140583. The reversal of 13531140521 is 12504113531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13531140521 - 2² = 13531140517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13531146521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13778675 + ... + 13779656.

It is an arithmetic number, because the mean of its divisors is an integer number (3389674836).

Almost surely, 2^13531140521 is an apocalyptic number.

It is an amenable number.

13531140521 is a deficient number, since it is larger than the sum of its proper divisors (27558823).

13531140521 is an equidigital number, since it uses as much as digits as its factorization.

13531140521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27558822.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 13531140521 in words is "thirteen billion, five hundred thirty-one million, one hundred forty thousand, five hundred twenty-one".