51212936 has 32 divisors (see below), whose sum is σ = 98998200. Its totient is φ = 24821760.

The previous prime is 51212933. The next prime is 51212947. The reversal of 51212936 is 63921215.

It can be written as a sum of positive squares in 4 ways, for example, as 35164900 + 16048036 = 5930^2 + 4006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51212899 and 51212908.

It is not an unprimeable number, because it can be changed into a prime (51212933) 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 in 7 ways as a sum of consecutive naturals, for example, 62900 + ... + 63708.

Almost surely, 2^51212936 is an apocalyptic number.

It is an amenable number.

51212936 is a deficient number, since it is larger than the sum of its proper divisors (47785264).

51212936 is a wasteful number, since it uses less digits than its factorization.

51212936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1045 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 51212936 is about 7156.3214013905. The cubic root of 51212936 is about 371.3583767604.

The spelling of 51212936 in words is "fifty-one million, two hundred twelve thousand, nine hundred thirty-six".