220563864 has 32 divisors (see below), whose sum is σ = 612678000. Its totient is φ = 73521216.

The previous prime is 220563857. The next prime is 220563881. The reversal of 220563864 is 468365022.

220563864 is a `hidden beast` number, since 220 + 56 + 386 + 4 = 666.

It is a super-2 number, since 2×220563864² = 97296836205220992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510349 + ... + 510780.

Almost surely, 2^220563864 is an apocalyptic number.

220563864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

220563864 is an abundant number, since it is smaller than the sum of its proper divisors (392114136).

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

220563864 is a wasteful number, since it uses less digits than its factorization.

220563864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021144 (or 1021134 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 220563864 is about 14851.3926619694. The cubic root of 220563864 is about 604.1963822044.

The spelling of 220563864 in words is "two hundred twenty million, five hundred sixty-three thousand, eight hundred sixty-four".