215020075211 has 4 divisors (see below), whose sum is σ = 216111547872. Its totient is φ = 213928602552.

The previous prime is 215020075201. The next prime is 215020075219. The reversal of 215020075211 is 112570020512.

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-215020075211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215020075219) 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, 545736035 + ... + 545736428.

It is an arithmetic number, because the mean of its divisors is an integer number (54027886968).

Almost surely, 2^215020075211 is an apocalyptic number.

215020075211 is a deficient number, since it is larger than the sum of its proper divisors (1091472661).

215020075211 is a wasteful number, since it uses less digits than its factorization.

215020075211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091472660.

The product of its (nonzero) digits is 1400, while the sum is 26.

Adding to 215020075211 its reverse (112570020512), we get a palindrome (327590095723).

The spelling of 215020075211 in words is "two hundred fifteen billion, twenty million, seventy-five thousand, two hundred eleven".