2157212208 has 40 divisors (see below), whose sum is σ = 5595951856. Its totient is φ = 716083200.

The previous prime is 2157212173. The next prime is 2157212219. The reversal of 2157212208 is 8022127512.

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, 81673 + ... + 104808.

Almost surely, 2^2157212208 is an apocalyptic number.

It is an amenable number.

2157212208 is an abundant number, since it is smaller than the sum of its proper divisors (3438739648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2157212208 is a wasteful number, since it uses less digits than its factorization.

2157212208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186733 (or 186727 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 2157212208 is about 46445.7986043948. The cubic root of 2157212208 is about 1292.1044527629.

The spelling of 2157212208 in words is "two billion, one hundred fifty-seven million, two hundred twelve thousand, two hundred eight".