51021212 has 24 divisors (see below), whose sum is σ = 97910400. Its totient is φ = 23070960.

The previous prime is 51021197. The next prime is 51021241. The reversal of 51021212 is 21212015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5843 + ... + 11669.

It is an arithmetic number, because the mean of its divisors is an integer number (4079600).

Almost surely, 2^51021212 is an apocalyptic number.

It is an amenable number.

51021212 is a deficient number, since it is larger than the sum of its proper divisors (46889188).

51021212 is a wasteful number, since it uses less digits than its factorization.

51021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6041 (or 6039 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 51021212 is about 7142.9134112069. The cubic root of 51021212 is about 370.8943836644.

Adding to 51021212 its reverse (21212015), we get a palindrome (72233227).

The spelling of 51021212 in words is "fifty-one million, twenty-one thousand, two hundred twelve".