13520002531 has 16 divisors (see below), whose sum is σ = 16452288000. Its totient is φ = 11084716104.

The previous prime is 13520002513. The next prime is 13520002543.

13520002531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13520002531 - 2⁹ = 13520002019 is a prime.

It is a super-2 number, since 2×13520002531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13520002031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849001 + ... + 864778.

It is an arithmetic number, because the mean of its divisors is an integer number (1028268000).

Almost surely, 2^13520002531 is an apocalyptic number.

13520002531 is a deficient number, since it is larger than the sum of its proper divisors (2932285469).

13520002531 is an equidigital number, since it uses as much as digits as its factorization.

13520002531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713823 (or 1713809 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

It can be divided in two parts, 1352000 and 2531, that added together give a palindrome (1354531).

The spelling of 13520002531 in words is "thirteen billion, five hundred twenty million, two thousand, five hundred thirty-one".