2155043 has 4 divisors (see below), whose sum is σ = 2350968. Its totient is φ = 1959120.

The previous prime is 2155009. The next prime is 2155057. The reversal of 2155043 is 3405512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2155043 - 2⁶ = 2154979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97946 + ... + 97967.

It is an arithmetic number, because the mean of its divisors is an integer number (587742).

2^2155043 is an apocalyptic number.

2155043 is a deficient number, since it is larger than the sum of its proper divisors (195925).

2155043 is a wasteful number, since it uses less digits than its factorization.

2155043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195924.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2155043 is about 1468.0064713754. The cubic root of 2155043 is about 129.1671210991.

The spelling of 2155043 in words is "two million, one hundred fifty-five thousand, forty-three".