215600560551109 has 4 divisors (see below), whose sum is σ = 221427602728204. Its totient is φ = 209773518374016.

The previous prime is 215600560551097. The next prime is 215600560551113. The reversal of 215600560551109 is 901155065006512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 191524757527009 + 24075803024100 = 13839247^2 + 4906710^2 .

It is a cyclic number.

It is not a de Polignac number, because 215600560551109 - 2¹⁹ = 215600560026821 is a prime.

It is a super-2 number, since 2×215600560551109² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215600560551709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2913521088492 + ... + 2913521088565.

It is an arithmetic number, because the mean of its divisors is an integer number (55356900682051).

Almost surely, 2^{215600560551109} is an apocalyptic number.

It is an amenable number.

215600560551109 is a deficient number, since it is larger than the sum of its proper divisors (5827042177095).

215600560551109 is an equidigital number, since it uses as much as digits as its factorization.

215600560551109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5827042177094.

The product of its (nonzero) digits is 405000, while the sum is 46.

The spelling of 215600560551109 in words is "two hundred fifteen trillion, six hundred billion, five hundred sixty million, five hundred fifty-one thousand, one hundred nine".