220911064 has 32 divisors (see below), whose sum is σ = 455336640. Its totient is φ = 99642400.

The previous prime is 220911017. The next prime is 220911077. The reversal of 220911064 is 460119022.

It is a super-2 number, since 2×220911064² = 97603396395224192, which contains 22 as substring.

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, 1947 + ... + 21109.

It is an arithmetic number, because the mean of its divisors is an integer number (14229270).

Almost surely, 2^220911064 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 220911064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227668320).

220911064 is an abundant number, since it is smaller than the sum of its proper divisors (234425576).

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

220911064 is a wasteful number, since it uses less digits than its factorization.

220911064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19311 (or 19307 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 220911064 is about 14863.0772049398. The cubic root of 220911064 is about 604.5132473563.

The spelling of 220911064 in words is "two hundred twenty million, nine hundred eleven thousand, sixty-four".