16063621 has 6 divisors (see below), whose sum is σ = 18686310. Its totient is φ = 13768776.

The previous prime is 16063609. The next prime is 16063627. The reversal of 16063621 is 12636061.

16063621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 5239521 = 3290^2 + 2289^2 .

It is not a de Polignac number, because 16063621 - 2⁹ = 16063109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16063627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163866 + ... + 163963.

It is an arithmetic number, because the mean of its divisors is an integer number (3114385).

Almost surely, 2^16063621 is an apocalyptic number.

It is an amenable number.

16063621 is a deficient number, since it is larger than the sum of its proper divisors (2622689).

16063621 is an equidigital number, since it uses as much as digits as its factorization.

16063621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327843 (or 327836 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 16063621 is about 4007.9447351479. The cubic root of 16063621 is about 252.3177575936.

Adding to 16063621 its reverse (12636061), we get a palindrome (28699682).

The spelling of 16063621 in words is "sixteen million, sixty-three thousand, six hundred twenty-one".