215716133 has 4 divisors (see below), whose sum is σ = 215825100. Its totient is φ = 215607168.

The previous prime is 215716121. The next prime is 215716159. The reversal of 215716133 is 331617512.

215716133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 152720164 + 62995969 = 12358^2 + 7937^2 .

It is a cyclic number.

It is not a de Polignac number, because 215716133 - 2⁴ = 215716117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215716096 and 215716105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215716433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51458 + ... + 55491.

It is an arithmetic number, because the mean of its divisors is an integer number (53956275).

Almost surely, 2^215716133 is an apocalyptic number.

It is an amenable number.

215716133 is a deficient number, since it is larger than the sum of its proper divisors (108967).

215716133 is a wasteful number, since it uses less digits than its factorization.

215716133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108966.

The product of its digits is 3780, while the sum is 29.

The square root of 215716133 is about 14687.2779302361. The cubic root of 215716133 is about 599.7370449598.

The spelling of 215716133 in words is "two hundred fifteen million, seven hundred sixteen thousand, one hundred thirty-three".