220213656 has 96 divisors (see below), whose sum is σ = 647010000. Its totient is φ = 67260672.

The previous prime is 220213639. The next prime is 220213687. The reversal of 220213656 is 656312022.

220213656 is a `hidden beast` number, since 2 + 2 + 0 + 2 + 1 + 3 + 656 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138675 + ... + 140253.

Almost surely, 2^220213656 is an apocalyptic number.

220213656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220213656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323505000).

220213656 is an abundant number, since it is smaller than the sum of its proper divisors (426796344).

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

220213656 is a wasteful number, since it uses less digits than its factorization.

220213656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753 (or 1746 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 220213656 is about 14839.5975686674. The cubic root of 220213656 is about 603.8764348198.

Adding to 220213656 its reverse (656312022), we get a palindrome (876525678).

The spelling of 220213656 in words is "two hundred twenty million, two hundred thirteen thousand, six hundred fifty-six".