2171257210 has 16 divisors (see below), whose sum is σ = 3914712576. Its totient is φ = 867069648.

The previous prime is 2171257189. The next prime is 2171257211. The reversal of 2171257210 is 127521712.

It is not an unprimeable number, because it can be changed into a prime (2171257211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172782 + ... + 184921.

It is an arithmetic number, because the mean of its divisors is an integer number (244669536).

Almost surely, 2^2171257210 is an apocalyptic number.

2171257210 is a deficient number, since it is larger than the sum of its proper divisors (1743455366).

2171257210 is a wasteful number, since it uses less digits than its factorization.

2171257210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358317.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 2171257210 is about 46596.7510670004. The cubic root of 2171257210 is about 1294.9025651811.

Adding to 2171257210 its reverse (127521712), we get a palindrome (2298778922).

The spelling of 2171257210 in words is "two billion, one hundred seventy-one million, two hundred fifty-seven thousand, two hundred ten".