2157208 has 8 divisors (see below), whose sum is σ = 4044780. Its totient is φ = 1078600.

The previous prime is 2157187. The next prime is 2157209. The reversal of 2157208 is 8027512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134818 + ... + 134833.

2^2157208 is an apocalyptic number.

It is an amenable number.

2157208 is a deficient number, since it is larger than the sum of its proper divisors (1887572).

2157208 is a wasteful number, since it uses less digits than its factorization.

2157208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269657 (or 269653 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2157208 is about 1468.7436808375. The cubic root of 2157208 is about 129.2103612608.

The spelling of 2157208 in words is "two million, one hundred fifty-seven thousand, two hundred eight".