13245452521 has 4 divisors (see below), whose sum is σ = 15137660032. Its totient is φ = 11353245012.

The previous prime is 13245452513. The next prime is 13245452527. The reversal of 13245452521 is 12525454231.

It is a happy number.

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 13245452521 - 2³ = 13245452513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13245452527) 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, 946103745 + ... + 946103758.

It is an arithmetic number, because the mean of its divisors is an integer number (3784415008).

Almost surely, 2^13245452521 is an apocalyptic number.

It is an amenable number.

13245452521 is a deficient number, since it is larger than the sum of its proper divisors (1892207511).

13245452521 is an equidigital number, since it uses as much as digits as its factorization.

13245452521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892207510.

The product of its digits is 48000, while the sum is 34.

The spelling of 13245452521 in words is "thirteen billion, two hundred forty-five million, four hundred fifty-two thousand, five hundred twenty-one".