521055054 has 72 divisors (see below), whose sum is σ = 1231389432. Its totient is φ = 159157440.

The previous prime is 521055023. The next prime is 521055089. The reversal of 521055054 is 450550125.

521055054 is a `hidden beast` number, since 52 + 10 + 550 + 54 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 477049 + ... + 478139.

It is an arithmetic number, because the mean of its divisors is an integer number (17102631).

Almost surely, 2^521055054 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521055054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (615694716).

521055054 is an abundant number, since it is smaller than the sum of its proper divisors (710334378).

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

521055054 is a wasteful number, since it uses less digits than its factorization.

521055054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282 (or 1266 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 521055054 is about 22826.6303689353. The cubic root of 521055054 is about 804.6886410810.

The spelling of 521055054 in words is "five hundred twenty-one million, fifty-five thousand, fifty-four".