521326830 has 32 divisors (see below), whose sum is σ = 1254040704. Its totient is φ = 138703136.

The previous prime is 521326829. The next prime is 521326837. The reversal of 521326830 is 38623125.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521326837) 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, 6324 + ... + 32903.

It is an arithmetic number, because the mean of its divisors is an integer number (39188772).

Almost surely, 2^521326830 is an apocalyptic number.

521326830 is an abundant number, since it is smaller than the sum of its proper divisors (732713874).

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

521326830 is a wasteful number, since it uses less digits than its factorization.

521326830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39680.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 521326830 is about 22832.5826397278. The cubic root of 521326830 is about 804.8285220440.

Adding to 521326830 its reverse (38623125), we get a palindrome (559949955).

The spelling of 521326830 in words is "five hundred twenty-one million, three hundred twenty-six thousand, eight hundred thirty".