13522531 has 8 divisors (see below), whose sum is σ = 15619824. Its totient is φ = 11569920.

The previous prime is 13522499. The next prime is 13522549.

13522531 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 13522531 - 2⁵ = 13522499 is a prime.

It is a super-2 number, since 2×13522531² = 365717689291922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13522031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35970 + ... + 36343.

It is an arithmetic number, because the mean of its divisors is an integer number (1952478).

Almost surely, 2^13522531 is an apocalyptic number.

13522531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13522531 is a deficient number, since it is larger than the sum of its proper divisors (2097293).

13522531 is a wasteful number, since it uses less digits than its factorization.

13522531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72341.

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

The square root of 13522531 is about 3677.2994166915. The cubic root of 13522531 is about 238.2425498482.

It can be divided in two parts, 1352 and 2531, that added together give a palindrome (3883).

The spelling of 13522531 in words is "thirteen million, five hundred twenty-two thousand, five hundred thirty-one".