51507012 has 12 divisors (see below), whose sum is σ = 120183056. Its totient is φ = 17169000.

The previous prime is 51506993. The next prime is 51507013. The reversal of 51507012 is 21070515.

51507012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51507012.

It is not an unprimeable number, because it can be changed into a prime (51507013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2146114 + ... + 2146137.

Almost surely, 2^51507012 is an apocalyptic number.

It is an amenable number.

51507012 is an abundant number, since it is smaller than the sum of its proper divisors (68676044).

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

51507012 is a wasteful number, since it uses less digits than its factorization.

51507012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292258 (or 4292256 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 51507012 is about 7176.8385797648. The cubic root of 51507012 is about 372.0678278447.

Adding to 51507012 its reverse (21070515), we get a palindrome (72577527).

The spelling of 51507012 in words is "fifty-one million, five hundred seven thousand, twelve".