212031304 has 8 divisors (see below), whose sum is σ = 397558710. Its totient is φ = 106015648.

The previous prime is 212031283. The next prime is 212031311. The reversal of 212031304 is 403130212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 203632900 + 8398404 = 14270^2 + 2898^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13251949 + ... + 13251964.

Almost surely, 2^212031304 is an apocalyptic number.

It is an amenable number.

212031304 is a deficient number, since it is larger than the sum of its proper divisors (185527406).

212031304 is a wasteful number, since it uses less digits than its factorization.

212031304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26503919 (or 26503915 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 212031304 is about 14561.2947226543. The cubic root of 212031304 is about 596.3025429716.

Adding to 212031304 its reverse (403130212), we get a palindrome (615161516).

The spelling of 212031304 in words is "two hundred twelve million, thirty-one thousand, three hundred four".