215503430144 has 20 divisors (see below), whose sum is σ = 430585956174. Its totient is φ = 107751714816.

The previous prime is 215503430123. The next prime is 215503430167. The reversal of 215503430144 is 441034305512.

It can be written as a sum of positive squares in only one way, i.e., 190892095744 + 24611334400 = 436912^2 + 156880^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 215503430144.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210452057 + ... + 210453080.

Almost surely, 2^215503430144 is an apocalyptic number.

It is an amenable number.

215503430144 is a deficient number, since it is larger than the sum of its proper divisors (215082526030).

215503430144 is an frugal number, since it uses more digits than its factorization.

215503430144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420905155 (or 420905139 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 215503430144 its reverse (441034305512), we get a palindrome (656537735656).

The spelling of 215503430144 in words is "two hundred fifteen billion, five hundred three million, four hundred thirty thousand, one hundred forty-four".