212134505 has 16 divisors (see below), whose sum is σ = 285211584. Its totient is φ = 150108480.

The previous prime is 212134493. The next prime is 212134583. The reversal of 212134505 is 505431212.

212134505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212134505 - 2¹⁸ = 211872361 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50087 + ... + 54156.

It is an arithmetic number, because the mean of its divisors is an integer number (17825724).

Almost surely, 2^212134505 is an apocalyptic number.

It is an amenable number.

212134505 is a deficient number, since it is larger than the sum of its proper divisors (73077079).

212134505 is a wasteful number, since it uses less digits than its factorization.

212134505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104296.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 212134505 is about 14564.8379668296. The cubic root of 212134505 is about 596.3992724578.

Adding to 212134505 its reverse (505431212), we get a palindrome (717565717).

The spelling of 212134505 in words is "two hundred twelve million, one hundred thirty-four thousand, five hundred five".