215746133 has 16 divisors (see below), whose sum is σ = 233513280. Its totient is φ = 198594816.

The previous prime is 215745991. The next prime is 215746163. The reversal of 215746133 is 331647512.

It is not a de Polignac number, because 215746133 - 2²⁰ = 214697557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 215746133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215746163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150263 + ... + 151691.

It is an arithmetic number, because the mean of its divisors is an integer number (14594580).

Almost surely, 2^215746133 is an apocalyptic number.

It is an amenable number.

215746133 is a deficient number, since it is larger than the sum of its proper divisors (17767147).

215746133 is a wasteful number, since it uses less digits than its factorization.

215746133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636.

The product of its digits is 15120, while the sum is 32.

The square root of 215746133 is about 14688.2991867677. The cubic root of 215746133 is about 599.7648458125.

The spelling of 215746133 in words is "two hundred fifteen million, seven hundred forty-six thousand, one hundred thirty-three".