16521132 has 24 divisors (see below), whose sum is σ = 39094272. Its totient is φ = 5429200.

The previous prime is 16521103. The next prime is 16521133. The reversal of 16521132 is 23112561.

It is a super-2 number, since 2×16521132² = 545895605122848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16521099 and 16521108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16521133) 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, 8844 + ... + 10547.

It is an arithmetic number, because the mean of its divisors is an integer number (1628928).

Almost surely, 2^16521132 is an apocalyptic number.

16521132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16521132 is an abundant number, since it is smaller than the sum of its proper divisors (22573140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16521132 is a wasteful number, since it uses less digits than its factorization.

16521132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19469 (or 19467 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 16521132 is about 4064.6195393911. The cubic root of 16521132 is about 254.6908055601.

Adding to 16521132 its reverse (23112561), we get a palindrome (39633693).

It can be divided in two parts, 16521 and 132, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 16521132 in words is "sixteen million, five hundred twenty-one thousand, one hundred thirty-two".