13521402253 has 4 divisors (see below), whose sum is σ = 13552774848. Its totient is φ = 13490029660.

The previous prime is 13521402239. The next prime is 13521402287. The reversal of 13521402253 is 35220412531.

13521402253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-13521402253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13521403253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15685651 + ... + 15686512.

It is an arithmetic number, because the mean of its divisors is an integer number (3388193712).

Almost surely, 2^13521402253 is an apocalyptic number.

It is an amenable number.

13521402253 is a deficient number, since it is larger than the sum of its proper divisors (31372595).

13521402253 is an equidigital number, since it uses as much as digits as its factorization.

13521402253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31372594.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 13521402253 its reverse (35220412531), we get a palindrome (48741814784).

The spelling of 13521402253 in words is "thirteen billion, five hundred twenty-one million, four hundred two thousand, two hundred fifty-three".