210423243 has 4 divisors (see below), whose sum is σ = 280564328. Its totient is φ = 140282160.

The previous prime is 210423223. The next prime is 210423247. The reversal of 210423243 is 342324012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 210423243 - 2⁵ = 210423211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210423247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35070538 + ... + 35070543.

It is an arithmetic number, because the mean of its divisors is an integer number (70141082).

Almost surely, 2^210423243 is an apocalyptic number.

210423243 is a deficient number, since it is larger than the sum of its proper divisors (70141085).

210423243 is an equidigital number, since it uses as much as digits as its factorization.

210423243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70141084.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 210423243 is about 14505.9726664571. The cubic root of 210423243 is about 594.7912484747.

Adding to 210423243 its reverse (342324012), we get a palindrome (552747255).

The spelling of 210423243 in words is "two hundred ten million, four hundred twenty-three thousand, two hundred forty-three".