13652250221 has 4 divisors (see below), whose sum is σ = 14123017500. Its totient is φ = 13181482944.

The previous prime is 13652250179. The next prime is 13652250229. The reversal of 13652250221 is 12205225631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10037234596 + 3615015625 = 100186^2 + 60125^2 .

It is a cyclic number.

It is not a de Polignac number, because 13652250221 - 2¹⁰ = 13652249197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 470767249 = 13652250221 / (1 + 3 + 6 + 5 + 2 + 2 + 5 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13652250229) 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, 235383596 + ... + 235383653.

It is an arithmetic number, because the mean of its divisors is an integer number (3530754375).

Almost surely, 2^13652250221 is an apocalyptic number.

It is an amenable number.

13652250221 is a deficient number, since it is larger than the sum of its proper divisors (470767279).

13652250221 is an equidigital number, since it uses as much as digits as its factorization.

13652250221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470767278.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 13652250221 its reverse (12205225631), we get a palindrome (25857475852).

The spelling of 13652250221 in words is "thirteen billion, six hundred fifty-two million, two hundred fifty thousand, two hundred twenty-one".