215440303155344 has 20 divisors (see below), whose sum is σ = 419601009292800. Its totient is φ = 107156171724960.

The previous prime is 215440303155323. The next prime is 215440303155349. The reversal of 215440303155344 is 443551303044512.

It is a junction number, because it is equal to n+sod(n) for n = 215440303155295 and 215440303155304.

It is not an unprimeable number, because it can be changed into a prime (215440303155349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35248737644 + ... + 35248743755.

It is an arithmetic number, because the mean of its divisors is an integer number (20980050464640).

Almost surely, 2^{215440303155344} is an apocalyptic number.

It is an amenable number.

215440303155344 is a deficient number, since it is larger than the sum of its proper divisors (204160706137456).

215440303155344 is a wasteful number, since it uses less digits than its factorization.

215440303155344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70497481598 (or 70497481592 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 44.

Adding to 215440303155344 its reverse (443551303044512), we get a palindrome (658991606199856).

The spelling of 215440303155344 in words is "two hundred fifteen trillion, four hundred forty billion, three hundred three million, one hundred fifty-five thousand, three hundred forty-four".