210245247 has 8 divisors (see below), whose sum is σ = 311474480. Its totient is φ = 140163480.

The previous prime is 210245237. The next prime is 210245249. The reversal of 210245247 is 742542012.

210245247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210245247 - 2¹² = 210241151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 7786861 = 210245247 / (2 + 1 + 0 + 2 + 4 + 5 + 2 + 4 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210245247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210245249) 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, 3893404 + ... + 3893457.

It is an arithmetic number, because the mean of its divisors is an integer number (38934310).

Almost surely, 2^210245247 is an apocalyptic number.

210245247 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

210245247 is a deficient number, since it is larger than the sum of its proper divisors (101229233).

210245247 is an equidigital number, since it uses as much as digits as its factorization.

210245247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7786870 (or 7786864 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 210245247 is about 14499.8361025220. The cubic root of 210245247 is about 594.6234908206.

Adding to 210245247 its reverse (742542012), we get a palindrome (952787259).

The spelling of 210245247 in words is "two hundred ten million, two hundred forty-five thousand, two hundred forty-seven".