51317412 has 12 divisors (see below), whose sum is σ = 119740656. Its totient is φ = 17105800.

The previous prime is 51317401. The next prime is 51317417. The reversal of 51317412 is 21471315.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (51317417) 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 3 ways as a sum of consecutive naturals, for example, 2138214 + ... + 2138237.

It is an arithmetic number, because the mean of its divisors is an integer number (9978388).

Almost surely, 2^51317412 is an apocalyptic number.

It is an amenable number.

51317412 is an abundant number, since it is smaller than the sum of its proper divisors (68423244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51317412 is a wasteful number, since it uses less digits than its factorization.

51317412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4276458 (or 4276456 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 51317412 is about 7163.6172427064. The cubic root of 51317412 is about 371.6107328224.

Adding to 51317412 its reverse (21471315), we get a palindrome (72788727).

The spelling of 51317412 in words is "fifty-one million, three hundred seventeen thousand, four hundred twelve".