215404521452 has 12 divisors (see below), whose sum is σ = 377299677216. Its totient is φ = 107604613680.

The previous prime is 215404521433. The next prime is 215404521523. The reversal of 215404521452 is 254125404512.

215404521452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 24406799 + ... + 24415622.

It is an arithmetic number, because the mean of its divisors is an integer number (31441639768).

Almost surely, 2^215404521452 is an apocalyptic number.

It is an amenable number.

215404521452 is a deficient number, since it is larger than the sum of its proper divisors (161895155764).

215404521452 is a wasteful number, since it uses less digits than its factorization.

215404521452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48823528 (or 48823526 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 215404521452 its reverse (254125404512), we get a palindrome (469529925964).

The spelling of 215404521452 in words is "two hundred fifteen billion, four hundred four million, five hundred twenty-one thousand, four hundred fifty-two".