13550352521 has 4 divisors (see below), whose sum is σ = 13550620944. Its totient is φ = 13550084100.

The previous prime is 13550352463. The next prime is 13550352527. The reversal of 13550352521 is 12525305531.

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 a de Polignac number, because none of the positive numbers 2^k-13550352521 is a prime.

It is a super-2 number, since 2×13550352521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13550352527) 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, 33095 + ... + 167916.

It is an arithmetic number, because the mean of its divisors is an integer number (3387655236).

Almost surely, 2^13550352521 is an apocalyptic number.

It is an amenable number.

13550352521 is a deficient number, since it is larger than the sum of its proper divisors (268423).

13550352521 is an equidigital number, since it uses as much as digits as its factorization.

13550352521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268422.

The product of its (nonzero) digits is 22500, while the sum is 32.

The spelling of 13550352521 in words is "thirteen billion, five hundred fifty million, three hundred fifty-two thousand, five hundred twenty-one".