213740180 has 12 divisors (see below), whose sum is σ = 448854420. Its totient is φ = 85496064.

The previous prime is 213740123. The next prime is 213740183. The reversal of 213740180 is 81047312.

It can be written as a sum of positive squares in 2 ways, for example, as 30625156 + 183115024 = 5534^2 + 13532^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213740183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5343485 + ... + 5343524.

It is an arithmetic number, because the mean of its divisors is an integer number (37404535).

Almost surely, 2^213740180 is an apocalyptic number.

213740180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213740180 is an abundant number, since it is smaller than the sum of its proper divisors (235114240).

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

213740180 is a wasteful number, since it uses less digits than its factorization.

213740180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10687018 (or 10687016 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 213740180 is about 14619.8556764422. The cubic root of 213740180 is about 597.9002342861.

Adding to 213740180 its reverse (81047312), we get a palindrome (294787492).

The spelling of 213740180 in words is "two hundred thirteen million, seven hundred forty thousand, one hundred eighty".