212313505 has 16 divisors (see below), whose sum is σ = 271209600. Its totient is φ = 159096960.

The previous prime is 212313487. The next prime is 212313533. The reversal of 212313505 is 505313212.

212313505 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 212313505 - 2⁷ = 212313377 is a prime.

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, 4101 + ... + 21010.

It is an arithmetic number, because the mean of its divisors is an integer number (16950600).

Almost surely, 2^212313505 is an apocalyptic number.

It is an amenable number.

212313505 is a deficient number, since it is larger than the sum of its proper divisors (58896095).

212313505 is a wasteful number, since it uses less digits than its factorization.

212313505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25224.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 212313505 is about 14570.9816072906. The cubic root of 212313505 is about 596.5669733809.

Adding to 212313505 its reverse (505313212), we get a palindrome (717626717).

The spelling of 212313505 in words is "two hundred twelve million, three hundred thirteen thousand, five hundred five".