13251894521 has 4 divisors (see below), whose sum is σ = 13828063872. Its totient is φ = 12675725172.

The previous prime is 13251894511. The next prime is 13251894529. The reversal of 13251894521 is 12549815231.

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 13251894521 - 2²⁶ = 13184785657 is a prime.

It is a super-2 number, since 2×13251894521² (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 (13251894529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288084641 + ... + 288084686.

It is an arithmetic number, because the mean of its divisors is an integer number (3457015968).

Almost surely, 2^13251894521 is an apocalyptic number.

It is an amenable number.

13251894521 is a deficient number, since it is larger than the sum of its proper divisors (576169351).

13251894521 is an equidigital number, since it uses as much as digits as its factorization.

13251894521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576169350.

The product of its digits is 86400, while the sum is 41.

The spelling of 13251894521 in words is "thirteen billion, two hundred fifty-one million, eight hundred ninety-four thousand, five hundred twenty-one".