217065030 has 128 divisors (see below), whose sum is σ = 669247488. Its totient is φ = 43794432.

The previous prime is 217065001. The next prime is 217065031. The reversal of 217065030 is 30560712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217065031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61062 + ... + 64518.

It is an arithmetic number, because the mean of its divisors is an integer number (5228496).

Almost surely, 2^217065030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 217065030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334623744).

217065030 is an abundant number, since it is smaller than the sum of its proper divisors (452182458).

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

217065030 is a wasteful number, since it uses less digits than its factorization.

217065030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 217065030 is about 14733.1269593389. The cubic root of 217065030 is about 600.9845225309.

The spelling of 217065030 in words is "two hundred seventeen million, sixty-five thousand, thirty".