215947948804 has 81 divisors (see below), whose sum is σ = 464229085383. Its totient is φ = 87627926736.

The previous prime is 215947948759. The next prime is 215947948829. The reversal of 215947948804 is 408849749512.

The square root of 215947948804 is 464702.

It is a perfect power (a square), and thus also a powerful number.

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 26 ways as a sum of consecutive naturals, for example, 123609859 + ... + 123611605.

Almost surely, 2^215947948804 is an apocalyptic number.

215947948804 is the 464702-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215947948804

215947948804 is an abundant number, since it is smaller than the sum of its proper divisors (248281136579).

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

215947948804 is an equidigital number, since it uses as much as digits as its factorization.

215947948804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550 (or 1775 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 215947948804 in words is "two hundred fifteen billion, nine hundred forty-seven million, nine hundred forty-eight thousand, eight hundred four".