51366450 has 48 divisors (see below), whose sum is σ = 129161376. Its totient is φ = 13507200.

The previous prime is 51366433. The next prime is 51366451. The reversal of 51366450 is 5466315.

51366450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51366451) 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 23 ways as a sum of consecutive naturals, for example, 8605 + ... + 13295.

It is an arithmetic number, because the mean of its divisors is an integer number (2690862).

Almost surely, 2^51366450 is an apocalyptic number.

51366450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51366450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64580688).

51366450 is an abundant number, since it is smaller than the sum of its proper divisors (77794926).

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

51366450 is a wasteful number, since it uses less digits than its factorization.

51366450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779 (or 4774 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 51366450 is about 7167.0391376077. The cubic root of 51366450 is about 371.7290633263.

The spelling of 51366450 in words is "fifty-one million, three hundred sixty-six thousand, four hundred fifty".