13525230221 has 8 divisors (see below), whose sum is σ = 13993109400. Its totient is φ = 13057450560.

The previous prime is 13525230197. The next prime is 13525230241. The reversal of 13525230221 is 12203252531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7360782025 + 6164448196 = 85795^2 + 78514^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13525230221 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 (13525230241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345095 + ... + 382283.

It is an arithmetic number, because the mean of its divisors is an integer number (1749138675).

Almost surely, 2^13525230221 is an apocalyptic number.

It is an amenable number.

13525230221 is a deficient number, since it is larger than the sum of its proper divisors (467879179).

13525230221 is a wasteful number, since it uses less digits than its factorization.

13525230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49759.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 13525230221 its reverse (12203252531), we get a palindrome (25728482752).

The spelling of 13525230221 in words is "thirteen billion, five hundred twenty-five million, two hundred thirty thousand, two hundred twenty-one".