216133541 has 8 divisors (see below), whose sum is σ = 232947960. Its totient is φ = 199346112.

The previous prime is 216133537. The next prime is 216133633. The reversal of 216133541 is 145331612.

It can be written as a sum of positive squares in 4 ways, for example, as 132940900 + 83192641 = 11530^2 + 9121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216133541 - 2² = 216133537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216133541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216133241) 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 7 ways as a sum of consecutive naturals, for example, 11795 + ... + 23903.

It is an arithmetic number, because the mean of its divisors is an integer number (29118495).

Almost surely, 2^216133541 is an apocalyptic number.

It is an amenable number.

216133541 is a deficient number, since it is larger than the sum of its proper divisors (16814419).

216133541 is a wasteful number, since it uses less digits than its factorization.

216133541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13495.

The product of its digits is 2160, while the sum is 26.

The square root of 216133541 is about 14701.4809117993. The cubic root of 216133541 is about 600.1236236010.

The spelling of 216133541 in words is "two hundred sixteen million, one hundred thirty-three thousand, five hundred forty-one".