220865136 has 80 divisors (see below), whose sum is σ = 611579904. Its totient is φ = 68504832.

The previous prime is 220865093. The next prime is 220865149. The reversal of 220865136 is 631568022.

It is a junction number, because it is equal to n+sod(n) for n = 220865097 and 220865106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38145 + ... + 43551.

Almost surely, 2^220865136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220865136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305789952).

220865136 is an abundant number, since it is smaller than the sum of its proper divisors (390714768).

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

220865136 is a wasteful number, since it uses less digits than its factorization.

220865136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478 (or 5472 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 220865136 is about 14861.5320879107. The cubic root of 220865136 is about 604.4713511467.

The spelling of 220865136 in words is "two hundred twenty million, eight hundred sixty-five thousand, one hundred thirty-six".