51549360 has 40 divisors (see below), whose sum is σ = 159803760. Its totient is φ = 13746432.

The previous prime is 51549353. The next prime is 51549361. The reversal of 51549360 is 6394515.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (51549361) 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, 107155 + ... + 107634.

It is an arithmetic number, because the mean of its divisors is an integer number (3995094).

Almost surely, 2^51549360 is an apocalyptic number.

It is an amenable number.

51549360 is an abundant number, since it is smaller than the sum of its proper divisors (108254400).

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

51549360 is a wasteful number, since it uses less digits than its factorization.

51549360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214805 (or 214799 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 51549360 is about 7179.7882977146. The cubic root of 51549360 is about 372.1697687363.

The spelling of 51549360 in words is "fifty-one million, five hundred forty-nine thousand, three hundred sixty".