217707130 has 32 divisors (see below), whose sum is σ = 422573760. Its totient is φ = 80484480.

The previous prime is 217707107. The next prime is 217707137. The reversal of 217707130 is 31707712.

It is not an unprimeable number, because it can be changed into a prime (217707137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6184 + ... + 21763.

It is an arithmetic number, because the mean of its divisors is an integer number (13205430).

Almost surely, 2^217707130 is an apocalyptic number.

217707130 is a deficient number, since it is larger than the sum of its proper divisors (204866630).

217707130 is a wasteful number, since it uses less digits than its factorization.

217707130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28014.

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 217707130 is about 14754.9018973357. The cubic root of 217707130 is about 601.5765298870.

It can be divided in two parts, 21770 and 7130, that added together give a square (28900 = 170²).

The spelling of 217707130 in words is "two hundred seventeen million, seven hundred seven thousand, one hundred thirty".