217764230126 has 16 divisors (see below), whose sum is σ = 335857278960. Its totient is φ = 105831549120.

The previous prime is 217764230087. The next prime is 217764230129. The reversal of 217764230126 is 621032467712.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217764230129) 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, 4914116 + ... + 4958231.

It is an arithmetic number, because the mean of its divisors is an integer number (20991079935).

Almost surely, 2^217764230126 is an apocalyptic number.

217764230126 is a deficient number, since it is larger than the sum of its proper divisors (118093048834).

217764230126 is a wasteful number, since it uses less digits than its factorization.

217764230126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9872659.

The product of its (nonzero) digits is 169344, while the sum is 41.

Adding to 217764230126 its reverse (621032467712), we get a palindrome (838796697838).

The spelling of 217764230126 in words is "two hundred seventeen billion, seven hundred sixty-four million, two hundred thirty thousand, one hundred twenty-six".