215436942091 has 16 divisors (see below), whose sum is σ = 251167081984. Its totient is φ = 180982128384.

The previous prime is 215436942031. The next prime is 215436942107. The reversal of 215436942091 is 190249634512.

It is a cyclic number.

It is not a de Polignac number, because 215436942091 - 2²⁹ = 214900071179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215436942011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470285 + ... + 1610158.

It is an arithmetic number, because the mean of its divisors is an integer number (15697942624).

Almost surely, 2^215436942091 is an apocalyptic number.

215436942091 is a deficient number, since it is larger than the sum of its proper divisors (35730139893).

215436942091 is a wasteful number, since it uses less digits than its factorization.

215436942091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080650.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 215436942091 in words is "two hundred fifteen billion, four hundred thirty-six million, nine hundred forty-two thousand, ninety-one".