215042136161 has 8 divisors (see below), whose sum is σ = 217231743144. Its totient is φ = 212853715200.

The previous prime is 215042136149. The next prime is 215042136163. The reversal of 215042136161 is 161631240512.

It can be written as a sum of positive squares in 4 ways, for example, as 622203136 + 214419933025 = 24944^2 + 463055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215042136161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215042136163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70265 + ... + 659561.

It is an arithmetic number, because the mean of its divisors is an integer number (27153967893).

Almost surely, 2^215042136161 is an apocalyptic number.

It is an amenable number.

215042136161 is a deficient number, since it is larger than the sum of its proper divisors (2189606983).

215042136161 is a wasteful number, since it uses less digits than its factorization.

215042136161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593011.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 215042136161 its reverse (161631240512), we get a palindrome (376673376673).

The spelling of 215042136161 in words is "two hundred fifteen billion, forty-two million, one hundred thirty-six thousand, one hundred sixty-one".