212505503 has 6 divisors (see below), whose sum is σ = 247200336. Its totient is φ = 182147532.

The previous prime is 212505499. The next prime is 212505523. The reversal of 212505503 is 305505212.

It is not a de Polignac number, because 212505503 - 2² = 212505499 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 (212505523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2168375 + ... + 2168472.

It is an arithmetic number, because the mean of its divisors is an integer number (41200056).

Almost surely, 2^212505503 is an apocalyptic number.

212505503 is a deficient number, since it is larger than the sum of its proper divisors (34694833).

212505503 is an equidigital number, since it uses as much as digits as its factorization.

212505503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4336861 (or 4336854 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 212505503 is about 14577.5684872341. The cubic root of 212505503 is about 596.7467470863.

The spelling of 212505503 in words is "two hundred twelve million, five hundred five thousand, five hundred three".