210640016 has 10 divisors (see below), whose sum is σ = 408115062. Its totient is φ = 105320000.

The previous prime is 210639977. The next prime is 210640039. The reversal of 210640016 is 610046012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 202777600 + 7862416 = 14240^2 + 2804^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 210640016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6582485 + ... + 6582516.

Almost surely, 2^210640016 is an apocalyptic number.

It is an amenable number.

210640016 is a deficient number, since it is larger than the sum of its proper divisors (197475046).

210640016 is a wasteful number, since it uses less digits than its factorization.

210640016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13165009 (or 13165003 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 210640016 is about 14513.4425964345. The cubic root of 210640016 is about 594.9954249583.

Adding to 210640016 its reverse (610046012), we get a palindrome (820686028).

The spelling of 210640016 in words is "two hundred ten million, six hundred forty thousand, sixteen".