220516564 has 12 divisors (see below), whose sum is σ = 391664224. Its totient is φ = 108612504.

The previous prime is 220516561. The next prime is 220516579. The reversal of 220516564 is 465615022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220516561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411144 + ... + 411679.

Almost surely, 2^220516564 is an apocalyptic number.

It is an amenable number.

220516564 is a deficient number, since it is larger than the sum of its proper divisors (171147660).

220516564 is a wasteful number, since it uses less digits than its factorization.

220516564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822894 (or 822892 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 220516564 is about 14849.8001333351. The cubic root of 220516564 is about 604.1531890728.

It can be divided in two parts, 2205 and 16564, that added together give a square (18769 = 137²).

The spelling of 220516564 in words is "two hundred twenty million, five hundred sixteen thousand, five hundred sixty-four".