51663212 has 6 divisors (see below), whose sum is σ = 90410628. Its totient is φ = 25831604.

The previous prime is 51663203. The next prime is 51663229. The reversal of 51663212 is 21236615.

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 as a sum of consecutive naturals, namely, 6457898 + ... + 6457905.

It is an arithmetic number, because the mean of its divisors is an integer number (15068438).

Almost surely, 2^51663212 is an apocalyptic number.

It is an amenable number.

51663212 is a deficient number, since it is larger than the sum of its proper divisors (38747416).

51663212 is a wasteful number, since it uses less digits than its factorization.

51663212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12915807 (or 12915805 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 51663212 is about 7187.7125707696. The cubic root of 51663212 is about 372.4435588554.

Adding to 51663212 its reverse (21236615), we get a palindrome (72899827).

The spelling of 51663212 in words is "fifty-one million, six hundred sixty-three thousand, two hundred twelve".