219368664 has 48 divisors (see below), whose sum is σ = 619959600. Its totient is φ = 69943104.

The previous prime is 219368659. The next prime is 219368717. The reversal of 219368664 is 466863912.

It is a super-2 number, since 2×219368664² = 96245221490289792, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 64579 + ... + 67890.

It is an arithmetic number, because the mean of its divisors is an integer number (12915825).

Almost surely, 2^219368664 is an apocalyptic number.

219368664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

219368664 is an abundant number, since it is smaller than the sum of its proper divisors (400590936).

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

219368664 is a wasteful number, since it uses less digits than its factorization.

219368664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132504 (or 132497 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 219368664 is about 14811.0993514999. The cubic root of 219368664 is about 603.1030573921.

The spelling of 219368664 in words is "two hundred nineteen million, three hundred sixty-eight thousand, six hundred sixty-four".