521542432152 has 64 divisors (see below), whose sum is σ = 1655690265600. Its totient is φ = 149012123040.

The previous prime is 521542432141. The next prime is 521542432223. The reversal of 521542432152 is 251234245125.

521542432152 is a `hidden beast` number, since 5 + 2 + 1 + 542 + 43 + 21 + 52 = 666.

It is a super-2 number, since 2×521542432152² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172466224 + ... + 172469247.

It is an arithmetic number, because the mean of its divisors is an integer number (25870160400).

Almost surely, 2^521542432152 is an apocalyptic number.

It is an amenable number.

521542432152 is an abundant number, since it is smaller than the sum of its proper divisors (1134147833448).

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

521542432152 is a wasteful number, since it uses less digits than its factorization.

521542432152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344935493 (or 344935483 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

Adding to 521542432152 its reverse (251234245125), we get a palindrome (772776677277).

The spelling of 521542432152 in words is "five hundred twenty-one billion, five hundred forty-two million, four hundred thirty-two thousand, one hundred fifty-two".