212510404 has 12 divisors (see below), whose sum is σ = 393769404. Its totient is φ = 100004864.

The previous prime is 212510381. The next prime is 212510407. The reversal of 212510404 is 404015212.

It can be written as a sum of positive squares in 2 ways, for example, as 68558400 + 143952004 = 8280^2 + 11998^2 .

It is not an unprimeable number, because it can be changed into a prime (212510407) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1562509 + ... + 1562644.

It is an arithmetic number, because the mean of its divisors is an integer number (32814117).

Almost surely, 2^212510404 is an apocalyptic number.

It is an amenable number.

212510404 is a deficient number, since it is larger than the sum of its proper divisors (181259000).

212510404 is a wasteful number, since it uses less digits than its factorization.

212510404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3125174 (or 3125172 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 212510404 is about 14577.7365870014. The cubic root of 212510404 is about 596.7513346276.

Adding to 212510404 its reverse (404015212), we get a palindrome (616525616).

The spelling of 212510404 in words is "two hundred twelve million, five hundred ten thousand, four hundred four".