215552552161 has 16 divisors (see below), whose sum is σ = 226955490048. Its totient is φ = 204451171200.

The previous prime is 215552552081. The next prime is 215552552167. The reversal of 215552552161 is 161255255512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 215552552161 - 2²³ = 215544163553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215552552167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1903416 + ... + 2013478.

It is an arithmetic number, because the mean of its divisors is an integer number (14184718128).

Almost surely, 2^215552552161 is an apocalyptic number.

It is an amenable number.

215552552161 is a deficient number, since it is larger than the sum of its proper divisors (11402937887).

215552552161 is a wasteful number, since it uses less digits than its factorization.

215552552161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111432.

The product of its digits is 150000, while the sum is 40.

The spelling of 215552552161 in words is "two hundred fifteen billion, five hundred fifty-two million, five hundred fifty-two thousand, one hundred sixty-one".