215053133305 has 4 divisors (see below), whose sum is σ = 258063759972. Its totient is φ = 172042506640.

The previous prime is 215053133209. The next prime is 215053133311. The reversal of 215053133305 is 503331350512.

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 164573828329 + 50479304976 = 405677^2 + 224676^2 .

It is not a de Polignac number, because 215053133305 - 2⁹ = 215053132793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21505313326 + ... + 21505313335.

It is an arithmetic number, because the mean of its divisors is an integer number (64515939993).

Almost surely, 2^215053133305 is an apocalyptic number.

It is an amenable number.

215053133305 is a deficient number, since it is larger than the sum of its proper divisors (43010626667).

215053133305 is an equidigital number, since it uses as much as digits as its factorization.

215053133305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43010626666.

The product of its (nonzero) digits is 20250, while the sum is 31.

Adding to 215053133305 its reverse (503331350512), we get a palindrome (718384483817).

The spelling of 215053133305 in words is "two hundred fifteen billion, fifty-three million, one hundred thirty-three thousand, three hundred five".