2155839 has 16 divisors (see below), whose sum is σ = 3306240. Its totient is φ = 1224000.

The previous prime is 2155837. The next prime is 2155841. The reversal of 2155839 is 9385512.

It is an interprime number because it is at equal distance from previous prime (2155837) and next prime (2155841).

It is not a de Polignac number, because 2155839 - 2¹ = 2155837 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 1 + 5⁷ + 5⁹ + 8⁵ + 3 + 9⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5067 + ... + 5475.

It is an arithmetic number, because the mean of its divisors is an integer number (206640).

2^2155839 is an apocalyptic number.

2155839 is a deficient number, since it is larger than the sum of its proper divisors (1150401).

2155839 is a wasteful number, since it uses less digits than its factorization.

2155839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670.

The product of its digits is 10800, while the sum is 33.

The square root of 2155839 is about 1468.2775623158. The cubic root of 2155839 is about 129.1830224635.

The spelling of 2155839 in words is "two million, one hundred fifty-five thousand, eight hundred thirty-nine".