651105212 has 12 divisors (see below), whose sum is σ = 1160933256. Its totient is φ = 319410000.

The previous prime is 651105199. The next prime is 651105223. The reversal of 651105212 is 212501156.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535414 + ... + 1535837.

It is an arithmetic number, because the mean of its divisors is an integer number (96744438).

Almost surely, 2^651105212 is an apocalyptic number.

It is an amenable number.

651105212 is a deficient number, since it is larger than the sum of its proper divisors (509828044).

651105212 is a wasteful number, since it uses less digits than its factorization.

651105212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3071308 (or 3071306 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 651105212 is about 25516.7633527452. The cubic root of 651105212 is about 866.7297903398.

Adding to 651105212 its reverse (212501156), we get a palindrome (863606368).

The spelling of 651105212 in words is "six hundred fifty-one million, one hundred five thousand, two hundred twelve".