215621211140543 has 16 divisors (see below), whose sum is σ = 233704576850976. Its totient is φ = 197754476250240.

The previous prime is 215621211140497. The next prime is 215621211140557. The reversal of 215621211140543 is 345041112126512.

It is not a de Polignac number, because 215621211140543 - 2³⁸ = 215346333233599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215621211140497 and 215621211140506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215621211140243) 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, 55553993 + ... + 59308418.

It is an arithmetic number, because the mean of its divisors is an integer number (14606536053186).

Almost surely, 2^{215621211140543} is an apocalyptic number.

215621211140543 is a deficient number, since it is larger than the sum of its proper divisors (18083365710433).

215621211140543 is a wasteful number, since it uses less digits than its factorization.

215621211140543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114863354.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 215621211140543 in words is "two hundred fifteen trillion, six hundred twenty-one billion, two hundred eleven million, one hundred forty thousand, five hundred forty-three".