13521002157 has 24 divisors (see below), whose sum is σ = 21947138304. Its totient is φ = 7958849184.

The previous prime is 13521002147. The next prime is 13521002177. The reversal of 13521002157 is 75120012531.

It is not a de Polignac number, because 13521002157 - 2¹⁹ = 13520477869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13521002157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13521002107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2509573 + ... + 2514954.

It is an arithmetic number, because the mean of its divisors is an integer number (914464096).

Almost surely, 2^13521002157 is an apocalyptic number.

It is an amenable number.

13521002157 is a deficient number, since it is larger than the sum of its proper divisors (8426136147).

13521002157 is a wasteful number, since it uses less digits than its factorization.

13521002157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024569 (or 5024566 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

Adding to 13521002157 its reverse (75120012531), we get a palindrome (88641014688).

The spelling of 13521002157 in words is "thirteen billion, five hundred twenty-one million, two thousand, one hundred fifty-seven".