210220312 has 8 divisors (see below), whose sum is σ = 394163100. Its totient is φ = 105110152.

The previous prime is 210220303. The next prime is 210220319. The reversal of 210220312 is 213022012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 210220292 and 210220301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210220319) by changing a digit.

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 as a sum of consecutive naturals, namely, 13138762 + ... + 13138777.

Almost surely, 2^210220312 is an apocalyptic number.

It is an amenable number.

210220312 is a deficient number, since it is larger than the sum of its proper divisors (183942788).

210220312 is a wasteful number, since it uses less digits than its factorization.

210220312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26277545 (or 26277541 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 210220312 is about 14498.9762397212. The cubic root of 210220312 is about 594.5999825239.

Adding to 210220312 its reverse (213022012), we get a palindrome (423242324).

The spelling of 210220312 in words is "two hundred ten million, two hundred twenty thousand, three hundred twelve".