51650212 has 6 divisors (see below), whose sum is σ = 90387878. Its totient is φ = 25825104.

The previous prime is 51650197. The next prime is 51650213. The reversal of 51650212 is 21205615.

It can be written as a sum of positive squares in only one way, i.e., 51494976 + 155236 = 7176^2 + 394^2 .

It is not an unprimeable number, because it can be changed into a prime (51650213) by changing a digit.

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, 6456273 + ... + 6456280.

Almost surely, 2^51650212 is an apocalyptic number.

It is an amenable number.

51650212 is a deficient number, since it is larger than the sum of its proper divisors (38737666).

51650212 is a wasteful number, since it uses less digits than its factorization.

51650212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12912557 (or 12912555 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 51650212 is about 7186.8081927932. The cubic root of 51650212 is about 372.4123169442.

Adding to 51650212 its reverse (21205615), we get a palindrome (72855827).

The spelling of 51650212 in words is "fifty-one million, six hundred fifty thousand, two hundred twelve".