651020212 has 24 divisors (see below), whose sum is σ = 1178231040. Its totient is φ = 314422080.

The previous prime is 651020191. The next prime is 651020231. The reversal of 651020212 is 212020156.

It is a self number, because there is not a number n which added to its sum of digits gives 651020212.

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 7 ways as a sum of consecutive naturals, for example, 65943 + ... + 75169.

It is an arithmetic number, because the mean of its divisors is an integer number (49092960).

Almost surely, 2^651020212 is an apocalyptic number.

651020212 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

651020212 is a deficient number, since it is larger than the sum of its proper divisors (527210828).

651020212 is a wasteful number, since it uses less digits than its factorization.

651020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9831 (or 9829 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 651020212 is about 25515.0977266402. The cubic root of 651020212 is about 866.6920722993.

Adding to 651020212 its reverse (212020156), we get a palindrome (863040368).

The spelling of 651020212 in words is "six hundred fifty-one million, twenty thousand, two hundred twelve".