220247864 has 8 divisors (see below), whose sum is σ = 412964760. Its totient is φ = 110123928.

The previous prime is 220247851. The next prime is 220247879. The reversal of 220247864 is 468742022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 13765484 + ... + 13765499.

It is an arithmetic number, because the mean of its divisors is an integer number (51620595).

Almost surely, 2^220247864 is an apocalyptic number.

It is an amenable number.

220247864 is a deficient number, since it is larger than the sum of its proper divisors (192716896).

220247864 is a wasteful number, since it uses less digits than its factorization.

220247864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27530989 (or 27530985 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 220247864 is about 14840.7501158129. The cubic root of 220247864 is about 603.9077019324.

Adding to 220247864 its reverse (468742022), we get a palindrome (688989886).

The spelling of 220247864 in words is "two hundred twenty million, two hundred forty-seven thousand, eight hundred sixty-four".