212103503 has 4 divisors (see below), whose sum is σ = 212155608. Its totient is φ = 212051400.

The previous prime is 212103431. The next prime is 212103523. The reversal of 212103503 is 305301212.

212103503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 212103503 - 2¹⁰ = 212102479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212103523) 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, 19376 + ... + 28277.

It is an arithmetic number, because the mean of its divisors is an integer number (53038902).

Almost surely, 2^212103503 is an apocalyptic number.

212103503 is a deficient number, since it is larger than the sum of its proper divisors (52105).

212103503 is an equidigital number, since it uses as much as digits as its factorization.

212103503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52104.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 212103503 is about 14563.7736524570. The cubic root of 212103503 is about 596.3702178241.

Adding to 212103503 its reverse (305301212), we get a palindrome (517404715).

The spelling of 212103503 in words is "two hundred twelve million, one hundred three thousand, five hundred three".