521055534 has 64 divisors (see below), whose sum is σ = 1100911680. Its totient is φ = 164229120.

The previous prime is 521055527. The next prime is 521055541. The reversal of 521055534 is 435550125.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (521055527) and next prime (521055541).

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 31 ways as a sum of consecutive naturals, for example, 1475902 + ... + 1476254.

It is an arithmetic number, because the mean of its divisors is an integer number (17201745).

Almost surely, 2^521055534 is an apocalyptic number.

521055534 is an abundant number, since it is smaller than the sum of its proper divisors (579856146).

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

521055534 is a wasteful number, since it uses less digits than its factorization.

521055534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 521055534 is about 22826.6408829683. The cubic root of 521055534 is about 804.6888881761.

The spelling of 521055534 in words is "five hundred twenty-one million, fifty-five thousand, five hundred thirty-four".