521530854 has 32 divisors (see below), whose sum is σ = 1142346240. Its totient is φ = 157749792.

The previous prime is 521530853. The next prime is 521530859. The reversal of 521530854 is 458035125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521530853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52062 + ... + 61265.

It is an arithmetic number, because the mean of its divisors is an integer number (35698320).

Almost surely, 2^521530854 is an apocalyptic number.

521530854 is an abundant number, since it is smaller than the sum of its proper divisors (620815386).

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

521530854 is a wasteful number, since it uses less digits than its factorization.

521530854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113404.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 521530854 is about 22837.0500284078. The cubic root of 521530854 is about 804.9334996440.

Adding to 521530854 its reverse (458035125), we get a palindrome (979565979).

The spelling of 521530854 in words is "five hundred twenty-one million, five hundred thirty thousand, eight hundred fifty-four".