215045541403867 has 4 divisors (see below), whose sum is σ = 215116961380776. Its totient is φ = 214974121426960.

The previous prime is 215045541403843. The next prime is 215045541403871. The reversal of 215045541403867 is 768304145540512.

215045541403867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 215045541403867 - 2¹¹ = 215045541401819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215045541403877) 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, 35709983938 + ... + 35709989959.

It is an arithmetic number, because the mean of its divisors is an integer number (53779240345194).

Almost surely, 2^{215045541403867} is an apocalyptic number.

215045541403867 is a deficient number, since it is larger than the sum of its proper divisors (71419976909).

215045541403867 is an equidigital number, since it uses as much as digits as its factorization.

215045541403867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71419976908.

The product of its (nonzero) digits is 16128000, while the sum is 55.

The spelling of 215045541403867 in words is "two hundred fifteen trillion, forty-five billion, five hundred forty-one million, four hundred three thousand, eight hundred sixty-seven".