2171930 has 16 divisors (see below), whose sum is σ = 4001184. Its totient is φ = 848400.

The previous prime is 2171929. The next prime is 2171941. The reversal of 2171930 is 391712.

It is a junction number, because it is equal to n+sod(n) for n = 2171896 and 2171905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2096 + ... + 2955.

It is an arithmetic number, because the mean of its divisors is an integer number (250074).

2^2171930 is an apocalyptic number.

2171930 is a deficient number, since it is larger than the sum of its proper divisors (1829254).

2171930 is a wasteful number, since it uses less digits than its factorization.

2171930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5101.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 2171930 is about 1473.7469253573. The cubic root of 2171930 is about 129.5036298382.

The spelling of 2171930 in words is "two million, one hundred seventy-one thousand, nine hundred thirty".