521432253220 has 48 divisors (see below), whose sum is σ = 1118479703040. Its totient is φ = 204103430784.

The previous prime is 521432253137. The next prime is 521432253233. The reversal of 521432253220 is 22352234125.

It is an unprimeable number.

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, 6537541 + ... + 6616819.

It is an arithmetic number, because the mean of its divisors is an integer number (23301660480).

Almost surely, 2^521432253220 is an apocalyptic number.

It is an amenable number.

521432253220 is an abundant number, since it is smaller than the sum of its proper divisors (597047449820).

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

521432253220 is a wasteful number, since it uses less digits than its factorization.

521432253220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86332 (or 86330 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 521432253220 its reverse (22352234125), we get a palindrome (543784487345).

The spelling of 521432253220 in words is "five hundred twenty-one billion, four hundred thirty-two million, two hundred fifty-three thousand, two hundred twenty".