2156212 has 24 divisors (see below), whose sum is σ = 4108104. Its totient is φ = 986112.

The previous prime is 2156207. The next prime is 2156221. The reversal of 2156212 is 2126512.

It can be written as a sum of positive squares in 4 ways, for example, as 1572516 + 583696 = 1254^2 + 764^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2156212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2088 + ... + 2944.

It is an arithmetic number, because the mean of its divisors is an integer number (171171).

2^2156212 is an apocalyptic number.

It is an amenable number.

2156212 is a deficient number, since it is larger than the sum of its proper divisors (1951892).

2156212 is a wasteful number, since it uses less digits than its factorization.

2156212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915 (or 913 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 2156212 is about 1468.4045764026. The cubic root of 2156212 is about 129.1904723842.

The spelling of 2156212 in words is "two million, one hundred fifty-six thousand, two hundred twelve".