421543513512 has 48 divisors (see below), whose sum is σ = 1245469474080. Its totient is φ = 127740458400.

The previous prime is 421543513429. The next prime is 421543513529. The reversal of 421543513512 is 215315345124.

421543513512 is a `hidden beast` number, since 4 + 21 + 543 + 51 + 35 + 12 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

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 11 ways as a sum of consecutive naturals, for example, 266125164 + ... + 266126747.

It is an arithmetic number, because the mean of its divisors is an integer number (25947280710).

Almost surely, 2^421543513512 is an apocalyptic number.

It is an amenable number.

421543513512 is an abundant number, since it is smaller than the sum of its proper divisors (823925960568).

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

421543513512 is a wasteful number, since it uses less digits than its factorization.

421543513512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532251934 (or 532251927 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

Adding to 421543513512 its reverse (215315345124), we get a palindrome (636858858636).

The spelling of 421543513512 in words is "four hundred twenty-one billion, five hundred forty-three million, five hundred thirteen thousand, five hundred twelve".