215545334404 has 6 divisors (see below), whose sum is σ = 377204335214. Its totient is φ = 107772667200.

The previous prime is 215545334387. The next prime is 215545334413. The reversal of 215545334404 is 404433545512.

It can be written as a sum of positive squares in only one way, i.e., 139756345600 + 75788988804 = 373840^2 + 275298^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26943166797 + ... + 26943166804.

Almost surely, 2^215545334404 is an apocalyptic number.

It is an amenable number.

215545334404 is a deficient number, since it is larger than the sum of its proper divisors (161659000810).

215545334404 is a wasteful number, since it uses less digits than its factorization.

215545334404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53886333605 (or 53886333603 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 40.

Adding to 215545334404 its reverse (404433545512), we get a palindrome (619978879916).

The spelling of 215545334404 in words is "two hundred fifteen billion, five hundred forty-five million, three hundred thirty-four thousand, four hundred four".