212315706 has 12 divisors (see below), whose sum is σ = 460017402. Its totient is φ = 70771896.

The previous prime is 212315611. The next prime is 212315707. The reversal of 212315706 is 607513212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 133194681 + 79121025 = 11541^2 + 8895^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212315706.

It is not an unprimeable number, because it can be changed into a prime (212315707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5897641 + ... + 5897676.

Almost surely, 2^212315706 is an apocalyptic number.

212315706 is an abundant number, since it is smaller than the sum of its proper divisors (247701696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212315706 is a wasteful number, since it uses less digits than its factorization.

212315706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11795325 (or 11795322 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 212315706 is about 14571.0571339213. The cubic root of 212315706 is about 596.5690348597.

Adding to 212315706 its reverse (607513212), we get a palindrome (819828918).

The spelling of 212315706 in words is "two hundred twelve million, three hundred fifteen thousand, seven hundred six".