215355424105321 has 16 divisors (see below), whose sum is σ = 226848138862464. Its totient is φ = 204040659015424.

The previous prime is 215355424105313. The next prime is 215355424105337. The reversal of 215355424105321 is 123501424553512.

It is a cyclic number.

It is not a de Polignac number, because 215355424105321 - 2³ = 215355424105313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215355424105721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13449441 + ... + 24730513.

It is an arithmetic number, because the mean of its divisors is an integer number (14178008678904).

Almost surely, 2^{215355424105321} is an apocalyptic number.

It is an amenable number.

215355424105321 is a deficient number, since it is larger than the sum of its proper divisors (11492714757143).

215355424105321 is a wasteful number, since it uses less digits than its factorization.

215355424105321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11288960.

The product of its (nonzero) digits is 720000, while the sum is 43.

Adding to 215355424105321 its reverse (123501424553512), we get a palindrome (338856848658833).

The spelling of 215355424105321 in words is "two hundred fifteen trillion, three hundred fifty-five billion, four hundred twenty-four million, one hundred five thousand, three hundred twenty-one".