215867209452 has 24 divisors (see below), whose sum is σ = 503978521536. Its totient is φ = 71914541328.

The previous prime is 215867209427. The next prime is 215867209469. The reversal of 215867209452 is 254902768512.

It is a junction number, because it is equal to n+sod(n) for n = 215867209395 and 215867209404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5127558 + ... + 5169485.

It is an arithmetic number, because the mean of its divisors is an integer number (20999105064).

Almost surely, 2^215867209452 is an apocalyptic number.

It is an amenable number.

215867209452 is an abundant number, since it is smaller than the sum of its proper divisors (288111312084).

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

215867209452 is a wasteful number, since it uses less digits than its factorization.

215867209452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10298797 (or 10298795 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 215867209452 in words is "two hundred fifteen billion, eight hundred sixty-seven million, two hundred nine thousand, four hundred fifty-two".