51345012 has 12 divisors (see below), whose sum is σ = 119805056. Its totient is φ = 17115000.

The previous prime is 51344989. The next prime is 51345013. The reversal of 51345012 is 21054315.

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 51345012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51345013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139364 + ... + 2139387.

Almost surely, 2^51345012 is an apocalyptic number.

It is an amenable number.

51345012 is an abundant number, since it is smaller than the sum of its proper divisors (68460044).

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

51345012 is a wasteful number, since it uses less digits than its factorization.

51345012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278758 (or 4278756 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 51345012 is about 7165.5433848383. The cubic root of 51345012 is about 371.6773419104.

Adding to 51345012 its reverse (21054315), we get a palindrome (72399327).

The spelling of 51345012 in words is "fifty-one million, three hundred forty-five thousand, twelve".