217374220550 has 24 divisors (see below), whose sum is σ = 425595844200. Its totient is φ = 82373388480.

The previous prime is 217374220487. The next prime is 217374220589. The reversal of 217374220550 is 55022473712.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114406535 + ... + 114408434.

It is an arithmetic number, because the mean of its divisors is an integer number (17733160175).

Almost surely, 2^217374220550 is an apocalyptic number.

217374220550 is a deficient number, since it is larger than the sum of its proper divisors (208221623650).

217374220550 is a wasteful number, since it uses less digits than its factorization.

217374220550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228815000 (or 228814995 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 38.

The spelling of 217374220550 in words is "two hundred seventeen billion, three hundred seventy-four million, two hundred twenty thousand, five hundred fifty".