212103506 has 16 divisors (see below), whose sum is σ = 329538240. Its totient is φ = 102266640.

The previous prime is 212103431. The next prime is 212103523. The reversal of 212103506 is 605301212.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58025 + ... + 61571.

It is an arithmetic number, because the mean of its divisors is an integer number (20596140).

Almost surely, 2^212103506 is an apocalyptic number.

212103506 is a deficient number, since it is larger than the sum of its proper divisors (117434734).

212103506 is a wasteful number, since it uses less digits than its factorization.

212103506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4609.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 212103506 is about 14563.7737554523. The cubic root of 212103506 is about 596.3702206357.

Adding to 212103506 its reverse (605301212), we get a palindrome (817404718).

The spelling of 212103506 in words is "two hundred twelve million, one hundred three thousand, five hundred six".