51451552 has 48 divisors (see below), whose sum is σ = 107775360. Its totient is φ = 24124672.

The previous prime is 51451549. The next prime is 51451559. The reversal of 51451552 is 25515415.

It is a self number, because there is not a number n which added to its sum of digits gives 51451552.

It is not an unprimeable number, because it can be changed into a prime (51451559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38349 + ... + 39667.

It is an arithmetic number, because the mean of its divisors is an integer number (2245320).

Almost surely, 2^51451552 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 51451552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53887680).

51451552 is an abundant number, since it is smaller than the sum of its proper divisors (56323808).

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

51451552 is a wasteful number, since it uses less digits than its factorization.

51451552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405 (or 1397 counting only the distinct ones).

The product of its digits is 5000, while the sum is 28.

The square root of 51451552 is about 7172.9737208497. The cubic root of 51451552 is about 371.9342389634.

Adding to 51451552 its reverse (25515415), we get a palindrome (76966967).

It can be divided in two parts, 51451 and 552, that added together give a triangular number (52003 = T₃₂₂).

The spelling of 51451552 in words is "fifty-one million, four hundred fifty-one thousand, five hundred fifty-two".