16143855 has 32 divisors (see below), whose sum is σ = 31793664. Its totient is φ = 6811776.

The previous prime is 16143847. The next prime is 16143857. The reversal of 16143855 is 55834161.

It is not a de Polignac number, because 16143855 - 2³ = 16143847 is a prime.

It is a super-2 number, since 2×16143855² = 521248108522050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16143857) 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 31 ways as a sum of consecutive naturals, for example, 4549 + ... + 7278.

It is an arithmetic number, because the mean of its divisors is an integer number (993552).

Almost surely, 2^16143855 is an apocalyptic number.

16143855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16143855 is a deficient number, since it is larger than the sum of its proper divisors (15649809).

16143855 is a wasteful number, since it uses less digits than its factorization.

16143855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11855.

The product of its digits is 14400, while the sum is 33.

The square root of 16143855 is about 4017.9416372068. The cubic root of 16143855 is about 252.7371493514.

The spelling of 16143855 in words is "sixteen million, one hundred forty-three thousand, eight hundred fifty-five".