13531153321 has 4 divisors (see below), whose sum is σ = 15464175232. Its totient is φ = 11598131412.

The previous prime is 13531153319. The next prime is 13531153343. The reversal of 13531153321 is 12335113531.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12335113531 = 13 ⋅948854887.

It is not a de Polignac number, because 13531153321 - 2¹ = 13531153319 is a prime.

It is a super-2 number, since 2×13531153321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13531153321.

It is not an unprimeable number, because it can be changed into a prime (13531153301) 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, 966510945 + ... + 966510958.

It is an arithmetic number, because the mean of its divisors is an integer number (3866043808).

Almost surely, 2^13531153321 is an apocalyptic number.

It is an amenable number.

13531153321 is a deficient number, since it is larger than the sum of its proper divisors (1933021911).

13531153321 is an equidigital number, since it uses as much as digits as its factorization.

13531153321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933021910.

The product of its digits is 4050, while the sum is 28.

Adding to 13531153321 its reverse (12335113531), we get a palindrome (25866266852).

The spelling of 13531153321 in words is "thirteen billion, five hundred thirty-one million, one hundred fifty-three thousand, three hundred twenty-one".