219926864 has 10 divisors (see below), whose sum is σ = 426108330. Its totient is φ = 109963424.

The previous prime is 219926857. The next prime is 219926867. The reversal of 219926864 is 468629912.

It can be written as a sum of positive squares in only one way, i.e., 218803264 + 1123600 = 14792^2 + 1060^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219926867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6872699 + ... + 6872730.

It is an arithmetic number, because the mean of its divisors is an integer number (42610833).

Almost surely, 2^219926864 is an apocalyptic number.

It is an amenable number.

219926864 is a deficient number, since it is larger than the sum of its proper divisors (206181466).

219926864 is a wasteful number, since it uses less digits than its factorization.

219926864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13745437 (or 13745431 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 219926864 is about 14829.9313552019. The cubic root of 219926864 is about 603.6141710853.

The spelling of 219926864 in words is "two hundred nineteen million, nine hundred twenty-six thousand, eight hundred sixty-four".