212210312 has 8 divisors (see below), whose sum is σ = 397894350. Its totient is φ = 106105152.

The previous prime is 212210309. The next prime is 212210329. The reversal of 212210312 is 213012212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 174927076 + 37283236 = 13226^2 + 6106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13263137 + ... + 13263152.

Almost surely, 2^212210312 is an apocalyptic number.

It is an amenable number.

212210312 is a deficient number, since it is larger than the sum of its proper divisors (185684038).

212210312 is a wasteful number, since it uses less digits than its factorization.

212210312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26526295 (or 26526291 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212210312 is about 14567.4401320205. The cubic root of 212210312 is about 596.4703057789.

Adding to 212210312 its reverse (213012212), we get a palindrome (425222524).

The spelling of 212210312 in words is "two hundred twelve million, two hundred ten thousand, three hundred twelve".