51321452 has 48 divisors (see below), whose sum is σ = 111155520. Its totient is φ = 20189952.

The previous prime is 51321449. The next prime is 51321469. The reversal of 51321452 is 25412315.

51321452 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 15 ways as a sum of consecutive naturals, for example, 100574 + ... + 101082.

It is an arithmetic number, because the mean of its divisors is an integer number (2315740).

Almost surely, 2^51321452 is an apocalyptic number.

51321452 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51321452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55577760).

51321452 is an abundant number, since it is smaller than the sum of its proper divisors (59834068).

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

51321452 is a wasteful number, since it uses less digits than its factorization.

51321452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810 (or 808 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 51321452 is about 7163.8992176049. The cubic root of 51321452 is about 371.6204843402.

Adding to 51321452 its reverse (25412315), we get a palindrome (76733767).

The spelling of 51321452 in words is "fifty-one million, three hundred twenty-one thousand, four hundred fifty-two".