2155802 has 32 divisors (see below), whose sum is σ = 3801600. Its totient is φ = 907200.

The previous prime is 2155799. The next prime is 2155837. The reversal of 2155802 is 2085512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19724 + ... + 19832.

It is an arithmetic number, because the mean of its divisors is an integer number (118800).

2^2155802 is an apocalyptic number.

2155802 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2155802 is the 1199-th pentagonal number.

2155802 is a deficient number, since it is larger than the sum of its proper divisors (1645798).

2155802 is a wasteful number, since it uses less digits than its factorization.

2155802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2155802 is about 1468.2649624642. The cubic root of 2155802 is about 129.1822834165.

The spelling of 2155802 in words is "two million, one hundred fifty-five thousand, eight hundred two".