215134911 has 12 divisors (see below), whose sum is σ = 312613392. Its totient is φ = 142563456.

The previous prime is 215134901. The next prime is 215134919. The reversal of 215134911 is 119431512.

It is a happy number.

It is not a de Polignac number, because 215134911 - 2⁵ = 215134879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215134919) 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 11 ways as a sum of consecutive naturals, for example, 70066 + ... + 73071.

It is an arithmetic number, because the mean of its divisors is an integer number (26051116).

Almost surely, 2^215134911 is an apocalyptic number.

215134911 is a deficient number, since it is larger than the sum of its proper divisors (97478481).

215134911 is a wasteful number, since it uses less digits than its factorization.

215134911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143310 (or 143307 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 215134911 is about 14667.4780040742. The cubic root of 215134911 is about 599.1979199237.

The spelling of 215134911 in words is "two hundred fifteen million, one hundred thirty-four thousand, nine hundred eleven".