217136126 has 8 divisors (see below), whose sum is σ = 325790640. Its totient is φ = 108539248.

The previous prime is 217136119. The next prime is 217136131. The reversal of 217136126 is 621631712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3266 + ... + 21093.

It is an arithmetic number, because the mean of its divisors is an integer number (40723830).

Almost surely, 2^217136126 is an apocalyptic number.

217136126 is a deficient number, since it is larger than the sum of its proper divisors (108654514).

217136126 is a wasteful number, since it uses less digits than its factorization.

217136126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28818.

The product of its digits is 3024, while the sum is 29.

The square root of 217136126 is about 14735.5395557815. The cubic root of 217136126 is about 601.0501294930.

Adding to 217136126 its reverse (621631712), we get a palindrome (838767838).

The spelling of 217136126 in words is "two hundred seventeen million, one hundred thirty-six thousand, one hundred twenty-six".