217241430 has 128 divisors (see below), whose sum is σ = 621969408. Its totient is φ = 47526912.

The previous prime is 217241341. The next prime is 217241443. The reversal of 217241430 is 34142712.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 217241430.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 567019 + ... + 567401.

It is an arithmetic number, because the mean of its divisors is an integer number (4859136).

Almost surely, 2^217241430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 217241430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310984704).

217241430 is an abundant number, since it is smaller than the sum of its proper divisors (404727978).

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

217241430 is a wasteful number, since it uses less digits than its factorization.

217241430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 217241430 is about 14739.1122527783. The cubic root of 217241430 is about 601.1472770828.

The spelling of 217241430 in words is "two hundred seventeen million, two hundred forty-one thousand, four hundred thirty".