51321450 has 24 divisors (see below), whose sum is σ = 127277568. Its totient is φ = 13685680.

The previous prime is 51321449. The next prime is 51321469. The reversal of 51321450 is 5412315.

51321450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 170922 + ... + 171221.

It is an arithmetic number, because the mean of its divisors is an integer number (5303232).

Almost surely, 2^51321450 is an apocalyptic number.

51321450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51321450 is an abundant number, since it is smaller than the sum of its proper divisors (75956118).

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

51321450 is a wasteful number, since it uses less digits than its factorization.

51321450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342158 (or 342153 counting only the distinct ones).

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

The square root of 51321450 is about 7163.8990780161. The cubic root of 51321450 is about 371.6204795128.

Adding to 51321450 its reverse (5412315), we get a palindrome (56733765).

The spelling of 51321450 in words is "fifty-one million, three hundred twenty-one thousand, four hundred fifty".