212009603 has 4 divisors (see below), whose sum is σ = 228318048. Its totient is φ = 195701160.

The previous prime is 212009563. The next prime is 212009617. The reversal of 212009603 is 306900212.

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 212009603 - 2¹⁰ = 212008579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212009663) 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, 8154203 + ... + 8154228.

It is an arithmetic number, because the mean of its divisors is an integer number (57079512).

Almost surely, 2^212009603 is an apocalyptic number.

212009603 is a deficient number, since it is larger than the sum of its proper divisors (16308445).

212009603 is a wasteful number, since it uses less digits than its factorization.

212009603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16308444.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 212009603 is about 14560.5495432006. The cubic root of 212009603 is about 596.2821988012.

Adding to 212009603 its reverse (306900212), we get a palindrome (518909815).

It can be divided in two parts, 21200 and 9603, that added together give a palindrome (30803).

The spelling of 212009603 in words is "two hundred twelve million, nine thousand, six hundred three".