51300612 has 54 divisors (see below), whose sum is σ = 142549134. Its totient is φ = 15544320.

The previous prime is 51300607. The next prime is 51300617. The reversal of 51300612 is 21600315.

51300612 is a `hidden beast` number, since 51 + 3 + 0 + 0 + 612 = 666.

It is an interprime number because it is at equal distance from previous prime (51300607) and next prime (51300617).

It can be written as a sum of positive squares in only one way, i.e., 47114496 + 4186116 = 6864^2 + 2046^2 .

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

It is not an unprimeable number, because it can be changed into a prime (51300617) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1533 + ... + 10244.

Almost surely, 2^51300612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51300612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71274567).

51300612 is an abundant number, since it is smaller than the sum of its proper divisors (91248522).

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

51300612 is a wasteful number, since it uses less digits than its factorization.

51300612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11809 (or 11793 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 51300612 is about 7162.4445547592. Note that the first 3 decimals coincide. The cubic root of 51300612 is about 371.5701764663.

Adding to 51300612 its reverse (21600315), we get a palindrome (72900927).

The spelling of 51300612 in words is "fifty-one million, three hundred thousand, six hundred twelve".