215522301056 has 32 divisors (see below), whose sum is σ = 429463726380. Its totient is φ = 107735326720.

The previous prime is 215522301041. The next prime is 215522301077. The reversal of 215522301056 is 650103225512.

It can be written as a sum of positive squares in 2 ways, for example, as 215496494656 + 25806400 = 464216^2 + 5080^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340136 + ... + 739416.

Almost surely, 2^215522301056 is an apocalyptic number.

It is an amenable number.

215522301056 is a deficient number, since it is larger than the sum of its proper divisors (213941425324).

215522301056 is an equidigital number, since it uses as much as digits as its factorization.

215522301056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403512 (or 403500 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 215522301056 its reverse (650103225512), we get a palindrome (865625526568).

The spelling of 215522301056 in words is "two hundred fifteen billion, five hundred twenty-two million, three hundred one thousand, fifty-six".