2071816 has 8 divisors (see below), whose sum is σ = 3884670. Its totient is φ = 1035904.

The previous prime is 2071801. The next prime is 2071819. The reversal of 2071816 is 6181702.

It can be written as a sum of positive squares in only one way, i.e., 1811716 + 260100 = 1346^2 + 510^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2071819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129481 + ... + 129496.

2^2071816 is an apocalyptic number.

It is an amenable number.

2071816 is a deficient number, since it is larger than the sum of its proper divisors (1812854).

2071816 is a wasteful number, since it uses less digits than its factorization.

2071816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258983 (or 258979 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 2071816 is about 1439.3804222651. The cubic root of 2071816 is about 127.4824479234.

The spelling of 2071816 in words is "two million, seventy-one thousand, eight hundred sixteen".