51450012 has 48 divisors (see below), whose sum is σ = 133812000. Its totient is φ = 17095680.

The previous prime is 51449977. The next prime is 51450013. The reversal of 51450012 is 21005415.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51450013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47962 + ... + 49022.

It is an arithmetic number, because the mean of its divisors is an integer number (2787750).

Almost surely, 2^51450012 is an apocalyptic number.

It is an amenable number.

51450012 is an abundant number, since it is smaller than the sum of its proper divisors (82361988).

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

51450012 is a wasteful number, since it uses less digits than its factorization.

51450012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523 (or 1515 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51450012 is about 7172.8663726574. The cubic root of 51450012 is about 371.9305281298.

Adding to 51450012 its reverse (21005415), we get a palindrome (72455427).

The spelling of 51450012 in words is "fifty-one million, four hundred fifty thousand, twelve".