51551344 has 80 divisors (see below), whose sum is σ = 116242560. Its totient is φ = 21934080.

The previous prime is 51551333. The next prime is 51551363. The reversal of 51551344 is 44315515.

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 15 ways as a sum of consecutive naturals, for example, 215577 + ... + 215815.

It is an arithmetic number, because the mean of its divisors is an integer number (1453032).

Almost surely, 2^51551344 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 51551344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58121280).

51551344 is an abundant number, since it is smaller than the sum of its proper divisors (64691216).

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

51551344 is a wasteful number, since it uses less digits than its factorization.

51551344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 332 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 51551344 is about 7179.9264620190. The cubic root of 51551344 is about 372.1745432886.

Adding to 51551344 its reverse (44315515), we get a palindrome (95866859).

The spelling of 51551344 in words is "fifty-one million, five hundred fifty-one thousand, three hundred forty-four".