220131564 has 24 divisors (see below), whose sum is σ = 514206000. Its totient is φ = 73296384.

The previous prime is 220131563. The next prime is 220131581. The reversal of 220131564 is 465131022.

220131564 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (220131563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1812 + ... + 21060.

It is an arithmetic number, because the mean of its divisors is an integer number (21425250).

Almost surely, 2^220131564 is an apocalyptic number.

It is an amenable number.

220131564 is an abundant number, since it is smaller than the sum of its proper divisors (294074436).

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

220131564 is a wasteful number, since it uses less digits than its factorization.

220131564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20209 (or 20207 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 220131564 is about 14836.8313328689. The cubic root of 220131564 is about 603.8013871191.

Adding to 220131564 its reverse (465131022), we get a palindrome (685262586).

The spelling of 220131564 in words is "two hundred twenty million, one hundred thirty-one thousand, five hundred sixty-four".