2143855 has 8 divisors (see below), whose sum is σ = 2940192. Its totient is φ = 1470048.

The previous prime is 2143847. The next prime is 2143859. The reversal of 2143855 is 5583412.

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 2143855 - 2³ = 2143847 is a prime.

It is a super-2 number, since 2×2143855² = 9192228522050, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30592 + ... + 30661.

It is an arithmetic number, because the mean of its divisors is an integer number (367524).

2^2143855 is an apocalyptic number.

2143855 is a deficient number, since it is larger than the sum of its proper divisors (796337).

2143855 is an equidigital number, since it uses as much as digits as its factorization.

2143855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61265.

The product of its digits is 4800, while the sum is 28.

The square root of 2143855 is about 1464.1909028539. The cubic root of 2143855 is about 128.9432075789.

It can be divided in two parts, 214 and 3855, that multiplied together give a triangular number (824970 = T₁₂₈₄).

The spelling of 2143855 in words is "two million, one hundred forty-three thousand, eight hundred fifty-five".