220055815 has 48 divisors (see below), whose sum is σ = 331521120. Its totient is φ = 139345920.

The previous prime is 220055813. The next prime is 220055831. The reversal of 220055815 is 518550022.

220055815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220055815 - 2¹ = 220055813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220055813) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 190279 + ... + 191431.

It is an arithmetic number, because the mean of its divisors is an integer number (6906690).

Almost surely, 2^220055815 is an apocalyptic number.

220055815 is a deficient number, since it is larger than the sum of its proper divisors (111465305).

220055815 is a wasteful number, since it uses less digits than its factorization.

220055815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 220055815 is about 14834.2783781349. The cubic root of 220055815 is about 603.7321215738.

The spelling of 220055815 in words is "two hundred twenty million, fifty-five thousand, eight hundred fifteen".