16055391 has 8 divisors (see below), whose sum is σ = 23353344. Its totient is φ = 9730520.

The previous prime is 16055371. The next prime is 16055393. The reversal of 16055391 is 19355061.

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 16055391 - 2¹¹ = 16053343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16055393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243231 + ... + 243296.

It is an arithmetic number, because the mean of its divisors is an integer number (2919168).

Almost surely, 2^16055391 is an apocalyptic number.

16055391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16055391 is a deficient number, since it is larger than the sum of its proper divisors (7297953).

16055391 is a wasteful number, since it uses less digits than its factorization.

16055391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486541.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 16055391 is about 4006.9178928448. The cubic root of 16055391 is about 252.2746595922.

It can be divided in two parts, 1605 and 5391, that added together give a palindrome (6996).

The spelling of 16055391 in words is "sixteen million, fifty-five thousand, three hundred ninety-one".