51544680 has 128 divisors (see below), whose sum is σ = 178692480. Its totient is φ = 11755520.

The previous prime is 51544657. The next prime is 51544681. The reversal of 51544680 is 8644515.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (51544681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21292 + ... + 23588.

It is an arithmetic number, because the mean of its divisors is an integer number (1396035).

Almost surely, 2^51544680 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 51544680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89346240).

51544680 is an abundant number, since it is smaller than the sum of its proper divisors (127147800).

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

51544680 is a wasteful number, since it uses less digits than its factorization.

51544680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339 (or 2335 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 51544680 is about 7179.4623754150. The cubic root of 51544680 is about 372.1585056981.

The spelling of 51544680 in words is "fifty-one million, five hundred forty-four thousand, six hundred eighty".