213111603 has 12 divisors (see below), whose sum is σ = 310044280. Its totient is φ = 141051456.

The previous prime is 213111593. The next prime is 213111617. The reversal of 213111603 is 306111312.

213111603 is a `hidden beast` number, since 21 + 31 + 11 + 603 = 666.

It is not a de Polignac number, because 213111603 - 2¹² = 213107507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213111653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83926 + ... + 86427.

Almost surely, 2^213111603 is an apocalyptic number.

213111603 is a deficient number, since it is larger than the sum of its proper divisors (96932677).

213111603 is a wasteful number, since it uses less digits than its factorization.

213111603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170498 (or 170495 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 213111603 is about 14598.3424744044. The cubic root of 213111603 is about 597.3135479106.

Adding to 213111603 its reverse (306111312), we get a palindrome (519222915).

The spelling of 213111603 in words is "two hundred thirteen million, one hundred eleven thousand, six hundred three".