220518807 has 8 divisors (see below), whose sum is σ = 309500160. Its totient is φ = 139275000.

The previous prime is 220518803. The next prime is 220518817. The reversal of 220518807 is 708815022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220518807 - 2² = 220518803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220518803) 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, 1934319 + ... + 1934432.

It is an arithmetic number, because the mean of its divisors is an integer number (38687520).

Almost surely, 2^220518807 is an apocalyptic number.

220518807 is a deficient number, since it is larger than the sum of its proper divisors (88981353).

220518807 is a wasteful number, since it uses less digits than its factorization.

220518807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868773.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 220518807 is about 14849.8756560451. The cubic root of 220518807 is about 604.1552374617.

It can be divided in two parts, 2205 and 18807, that added together give a palindrome (21012).

The spelling of 220518807 in words is "two hundred twenty million, five hundred eighteen thousand, eight hundred seven".