2155801 has 8 divisors (see below), whose sum is σ = 2232000. Its totient is φ = 2081040.

The previous prime is 2155799. The next prime is 2155837. The reversal of 2155801 is 1085512.

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 2155801 - 2¹ = 2155799 is a prime.

It is a Duffinian number.

2155801 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2155841) 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, 3300 + ... + 3898.

It is an arithmetic number, because the mean of its divisors is an integer number (279000).

2^2155801 is an apocalyptic number.

It is an amenable number.

2155801 is a deficient number, since it is larger than the sum of its proper divisors (76199).

2155801 is an equidigital number, since it uses as much as digits as its factorization.

2155801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 2155801 is about 1468.2646219262. The cubic root of 2155801 is about 129.1822634421.

The spelling of 2155801 in words is "two million, one hundred fifty-five thousand, eight hundred one".