16321155 has 16 divisors (see below), whose sum is σ = 26347680. Its totient is φ = 8626688.

The previous prime is 16321127. The next prime is 16321169. The reversal of 16321155 is 55112361.

It is a cyclic number.

It is not a de Polignac number, because 16321155 - 2¹⁵ = 16288387 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3120 + ... + 6509.

It is an arithmetic number, because the mean of its divisors is an integer number (1646730).

Almost surely, 2^16321155 is an apocalyptic number.

16321155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16321155 is a deficient number, since it is larger than the sum of its proper divisors (10026525).

16321155 is a wasteful number, since it uses less digits than its factorization.

16321155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9750.

The product of its digits is 900, while the sum is 24.

The square root of 16321155 is about 4039.9449253672. The cubic root of 16321155 is about 253.6590119233.

The spelling of 16321155 in words is "sixteen million, three hundred twenty-one thousand, one hundred fifty-five".