213730680 has 32 divisors (see below), whose sum is σ = 641192400. Its totient is φ = 56994816.

The previous prime is 213730679. The next prime is 213730687. The reversal of 213730680 is 86037312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213730687) 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, 890425 + ... + 890664.

Almost surely, 2^213730680 is an apocalyptic number.

213730680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213730680 is an abundant number, since it is smaller than the sum of its proper divisors (427461720).

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

213730680 is a wasteful number, since it uses less digits than its factorization.

213730680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781103 (or 1781099 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 213730680 is about 14619.5307722238. The cubic root of 213730680 is about 597.8913759667.

Adding to 213730680 its reverse (86037312), we get a palindrome (299767992).

The spelling of 213730680 in words is "two hundred thirteen million, seven hundred thirty thousand, six hundred eighty".