537221856 has 96 divisors (see below), whose sum is σ = 1477502208. Its totient is φ = 170593280.

The previous prime is 537221851. The next prime is 537221857. The reversal of 537221856 is 658122735.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537221851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1030876 + ... + 1031396.

It is an arithmetic number, because the mean of its divisors is an integer number (15390648).

Almost surely, 2^537221856 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 537221856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738751104).

537221856 is an abundant number, since it is smaller than the sum of its proper divisors (940280352).

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

537221856 is a wasteful number, since it uses less digits than its factorization.

537221856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024 (or 1016 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 537221856 is about 23178.0468547287. The cubic root of 537221856 is about 812.9263938179.

The spelling of 537221856 in words is "five hundred thirty-seven million, two hundred twenty-one thousand, eight hundred fifty-six".