220511478 has 16 divisors (see below), whose sum is σ = 481116096. Its totient is φ = 66821640.

The previous prime is 220511443. The next prime is 220511479. The reversal of 220511478 is 874115022.

220511478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220511479) 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, 1670476 + ... + 1670607.

It is an arithmetic number, because the mean of its divisors is an integer number (30069756).

Almost surely, 2^220511478 is an apocalyptic number.

220511478 is an abundant number, since it is smaller than the sum of its proper divisors (260604618).

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

220511478 is a wasteful number, since it uses less digits than its factorization.

220511478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341099.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 220511478 is about 14849.6288842516. The cubic root of 220511478 is about 604.1485443020.

The spelling of 220511478 in words is "two hundred twenty million, five hundred eleven thousand, four hundred seventy-eight".