215225311135 has 4 divisors (see below), whose sum is σ = 258270373368. Its totient is φ = 172180248904.

The previous prime is 215225311121. The next prime is 215225311141. The reversal of 215225311135 is 531113522512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215225311135 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215225311097 and 215225311106.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21522531109 + ... + 21522531118.

It is an arithmetic number, because the mean of its divisors is an integer number (64567593342).

Almost surely, 2^215225311135 is an apocalyptic number.

215225311135 is a deficient number, since it is larger than the sum of its proper divisors (43045062233).

215225311135 is an equidigital number, since it uses as much as digits as its factorization.

215225311135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43045062232.

The product of its digits is 9000, while the sum is 31.

Adding to 215225311135 its reverse (531113522512), we get a palindrome (746338833647).

The spelling of 215225311135 in words is "two hundred fifteen billion, two hundred twenty-five million, three hundred eleven thousand, one hundred thirty-five".