215123541133 has 8 divisors (see below), whose sum is σ = 227785489848. Its totient is φ = 202462439424.

The previous prime is 215123541109. The next prime is 215123541137. The reversal of 215123541133 is 331145321512.

215123541133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 50889494569 + 164234046564 = 225587^2 + 405258^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 215123541133 - 2²⁵ = 215089986701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215123541095 and 215123541104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215123541137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354435 + ... + 745567.

It is an arithmetic number, because the mean of its divisors is an integer number (28473186231).

Almost surely, 2^215123541133 is an apocalyptic number.

It is an amenable number.

215123541133 is a deficient number, since it is larger than the sum of its proper divisors (12661948715).

215123541133 is a wasteful number, since it uses less digits than its factorization.

215123541133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423503.

The product of its digits is 10800, while the sum is 31.

Adding to 215123541133 its reverse (331145321512), we get a palindrome (546268862645).

The spelling of 215123541133 in words is "two hundred fifteen billion, one hundred twenty-three million, five hundred forty-one thousand, one hundred thirty-three".