220232664 has 24 divisors (see below), whose sum is σ = 596463660. Its totient is φ = 73410864.

The previous prime is 220232657. The next prime is 220232707. The reversal of 220232664 is 466232022.

220232664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1529322 + ... + 1529465.

Almost surely, 2^220232664 is an apocalyptic number.

220232664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

220232664 is an abundant number, since it is smaller than the sum of its proper divisors (376230996).

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

220232664 is a wasteful number, since it uses less digits than its factorization.

220232664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3058799 (or 3058792 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 220232664 is about 14840.2380034823. The cubic root of 220232664 is about 603.8938090875.

Adding to 220232664 its reverse (466232022), we get a palindrome (686464686).

The spelling of 220232664 in words is "two hundred twenty million, two hundred thirty-two thousand, six hundred sixty-four".