215353234109 has 4 divisors (see below), whose sum is σ = 231918867516. Its totient is φ = 198787600704.

The previous prime is 215353234073. The next prime is 215353234163. The reversal of 215353234109 is 901432353512.

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 14640274009 + 200712960100 = 120997^2 + 448010^2 .

It is a cyclic number.

It is not a de Polignac number, because 215353234109 - 2²⁸ = 215084798653 is a prime.

It is a super-2 number, since 2×215353234109² (a number of 23 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 (215353234169) 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 3 ways as a sum of consecutive naturals, for example, 8282816684 + ... + 8282816709.

It is an arithmetic number, because the mean of its divisors is an integer number (57979716879).

Almost surely, 2^215353234109 is an apocalyptic number.

It is an amenable number.

215353234109 is a deficient number, since it is larger than the sum of its proper divisors (16565633407).

215353234109 is a wasteful number, since it uses less digits than its factorization.

215353234109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16565633406.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 215353234109 in words is "two hundred fifteen billion, three hundred fifty-three million, two hundred thirty-four thousand, one hundred nine".