220213685 has 12 divisors (see below), whose sum is σ = 267681708. Its totient is φ = 173916288.

The previous prime is 220213639. The next prime is 220213687. The reversal of 220213685 is 586312022.

It can be written as a sum of positive squares in 2 ways, for example, as 174055249 + 46158436 = 13193^2 + 6794^2 .

It is not a de Polignac number, because 220213685 - 2¹² = 220209589 is a prime.

It is a super-2 number, since 2×220213685² = 96988134122558450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220213687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27677 + ... + 34733.

It is an arithmetic number, because the mean of its divisors is an integer number (22306809).

Almost surely, 2^220213685 is an apocalyptic number.

It is an amenable number.

220213685 is a deficient number, since it is larger than the sum of its proper divisors (47468023).

220213685 is an frugal number, since it uses more digits than its factorization.

220213685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7220 (or 7141 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 220213685 is about 14839.5985457828. The cubic root of 220213685 is about 603.8764613280.

The spelling of 220213685 in words is "two hundred twenty million, two hundred thirteen thousand, six hundred eighty-five".