215011533125 has 10 divisors (see below), whose sum is σ = 268678412574. Its totient is φ = 172009226000.

The previous prime is 215011533109. The next prime is 215011533133. The reversal of 215011533125 is 521335110512.

215011533125 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 5 ways, for example, as 117128902081 + 97882631044 = 342241^2 + 312862^2 .

It is not a de Polignac number, because 215011533125 - 2⁴ = 215011533109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 172008602 + ... + 172009851.

Almost surely, 2^215011533125 is an apocalyptic number.

215011533125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215011533125 is a deficient number, since it is larger than the sum of its proper divisors (53666879449).

215011533125 is an frugal number, since it uses more digits than its factorization.

215011533125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344018473 (or 344018458 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

Adding to 215011533125 its reverse (521335110512), we get a palindrome (736346643637).

The spelling of 215011533125 in words is "two hundred fifteen billion, eleven million, five hundred thirty-three thousand, one hundred twenty-five".