16132621 has 4 divisors (see below), whose sum is σ = 16141500. Its totient is φ = 16123744.

The previous prime is 16132619. The next prime is 16132651. The reversal of 16132621 is 12623161.

16132621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12623161 = 71 ⋅177791.

It can be written as a sum of positive squares in 2 ways, for example, as 13764100 + 2368521 = 3710^2 + 1539^2 .

It is a cyclic number.

It is not a de Polignac number, because 16132621 - 2¹ = 16132619 is a prime.

It is a super-2 number, since 2×16132621² = 520522920659282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16132592 and 16132601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16132651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616 + ... + 5713.

It is an arithmetic number, because the mean of its divisors is an integer number (4035375).

Almost surely, 2^16132621 is an apocalyptic number.

It is an amenable number.

16132621 is a deficient number, since it is larger than the sum of its proper divisors (8879).

16132621 is an equidigital number, since it uses as much as digits as its factorization.

16132621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8878.

The product of its digits is 432, while the sum is 22.

The square root of 16132621 is about 4016.5434144299. The cubic root of 16132621 is about 252.6785118085.

Adding to 16132621 its reverse (12623161), we get a palindrome (28755782).

The spelling of 16132621 in words is "sixteen million, one hundred thirty-two thousand, six hundred twenty-one".