213730000 has 200 divisors, whose sum is σ = 592685280. Its totient is φ = 73920000.

The previous prime is 213729991. The next prime is 213730061. The reversal of 213730000 is 37312.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3189967 + ... + 3190033.

Almost surely, 2^213730000 is an apocalyptic number.

213730000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213730000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296342640).

213730000 is an abundant number, since it is smaller than the sum of its proper divisors (378955280).

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

213730000 is a wasteful number, since it uses less digits than its factorization.

213730000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 213730000 is about 14619.5075156450. The cubic root of 213730000 is about 597.8907418874.

Adding to 213730000 its reverse (37312), we get a palindrome (213767312).

The spelling of 213730000 in words is "two hundred thirteen million, seven hundred thirty thousand".