210505320250 has 16 divisors (see below), whose sum is σ = 394065959976. Its totient is φ = 84202128000.

The previous prime is 210505320227. The next prime is 210505320251. The reversal of 210505320250 is 52023505012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 140222538369 + 70282781881 = 374463^2 + 265109^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (210505320251) 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, 421010391 + ... + 421010890.

Almost surely, 2^210505320250 is an apocalyptic number.

210505320250 is a deficient number, since it is larger than the sum of its proper divisors (183560639726).

210505320250 is an equidigital number, since it uses as much as digits as its factorization.

210505320250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842021298 (or 842021288 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 210505320250 its reverse (52023505012), we get a palindrome (262528825262).

The spelling of 210505320250 in words is "two hundred ten billion, five hundred five million, three hundred twenty thousand, two hundred fifty".