13531153221 has 16 divisors (see below), whose sum is σ = 21101214400. Its totient is φ = 8545991184.

The previous prime is 13531153217. The next prime is 13531153249. The reversal of 13531153221 is 12235113531.

It is not a de Polignac number, because 13531153221 - 2² = 13531153217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531153201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13187746 + ... + 13188771.

It is an arithmetic number, because the mean of its divisors is an integer number (1318825900).

Almost surely, 2^13531153221 is an apocalyptic number.

It is an amenable number.

13531153221 is a deficient number, since it is larger than the sum of its proper divisors (7570061179).

13531153221 is a wasteful number, since it uses less digits than its factorization.

13531153221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26376545 (or 26376539 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

Adding to 13531153221 its reverse (12235113531), we get a palindrome (25766266752).

The spelling of 13531153221 in words is "thirteen billion, five hundred thirty-one million, one hundred fifty-three thousand, two hundred twenty-one".