210730330 has 32 divisors (see below), whose sum is σ = 400800960. Its totient is φ = 79551360.

The previous prime is 210730319. The next prime is 210730357. The reversal of 210730330 is 33037012.

210730330 = 6490² + 6491² + ... + 6494².

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 210730298 and 210730307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51417 + ... + 55363.

It is an arithmetic number, because the mean of its divisors is an integer number (12525030).

Almost surely, 2^210730330 is an apocalyptic number.

210730330 is a deficient number, since it is larger than the sum of its proper divisors (190070630).

210730330 is a wasteful number, since it uses less digits than its factorization.

210730330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4254.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 210730330 is about 14516.5536543630. The cubic root of 210730330 is about 595.0804495414.

Adding to 210730330 its reverse (33037012), we get a palindrome (243767342).

The spelling of 210730330 in words is "two hundred ten million, seven hundred thirty thousand, three hundred thirty".