217941330 has 32 divisors (see below), whose sum is σ = 545802624. Its totient is φ = 55590656.

The previous prime is 217941319. The next prime is 217941337. The reversal of 217941330 is 33149712.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (217941337) 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, 157239 + ... + 158618.

It is an arithmetic number, because the mean of its divisors is an integer number (17056332).

Almost surely, 2^217941330 is an apocalyptic number.

217941330 is an abundant number, since it is smaller than the sum of its proper divisors (327861294).

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

217941330 is a wasteful number, since it uses less digits than its factorization.

217941330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315890.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 217941330 is about 14762.8361096369. The cubic root of 217941330 is about 601.7921693298.

The spelling of 217941330 in words is "two hundred seventeen million, nine hundred forty-one thousand, three hundred thirty".