51054840 has 128 divisors (see below), whose sum is σ = 174484800. Its totient is φ = 13271040.

The previous prime is 51054811. The next prime is 51054853. The reversal of 51054840 is 4845015.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43704 + ... + 44856.

Almost surely, 2^51054840 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 51054840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87242400).

51054840 is an abundant number, since it is smaller than the sum of its proper divisors (123429960).

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

51054840 is a wasteful number, since it uses less digits than its factorization.

51054840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 51054840 is about 7145.2669649216. The cubic root of 51054840 is about 370.9758510690.

Adding to 51054840 its reverse (4845015), we get a palindrome (55899855).

The spelling of 51054840 in words is "fifty-one million, fifty-four thousand, eight hundred forty".