51549216 has 24 divisors (see below), whose sum is σ = 135316944. Its totient is φ = 17183040.

The previous prime is 51549191. The next prime is 51549227. The reversal of 51549216 is 61294515.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268390 + ... + 268581.

It is an arithmetic number, because the mean of its divisors is an integer number (5638206).

Almost surely, 2^51549216 is an apocalyptic number.

It is an amenable number.

51549216 is an abundant number, since it is smaller than the sum of its proper divisors (83767728).

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

51549216 is a wasteful number, since it uses less digits than its factorization.

51549216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536984 (or 536976 counting only the distinct ones).

The product of its digits is 10800, while the sum is 33.

The square root of 51549216 is about 7179.7782695568. The cubic root of 51549216 is about 372.1694221914.

The spelling of 51549216 in words is "fifty-one million, five hundred forty-nine thousand, two hundred sixteen".