216487333 has 8 divisors (see below), whose sum is σ = 235417752. Its totient is φ = 198245376.

The previous prime is 216487331. The next prime is 216487373. The reversal of 216487333 is 333784612.

It can be written as a sum of positive squares in 4 ways, for example, as 50154724 + 166332609 = 7082^2 + 12897^2 .

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 216487333 - 2¹ = 216487331 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216487292 and 216487301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216487331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171460 + ... + 172717.

It is an arithmetic number, because the mean of its divisors is an integer number (29427219).

Almost surely, 2^216487333 is an apocalyptic number.

It is an amenable number.

216487333 is a deficient number, since it is larger than the sum of its proper divisors (18930419).

216487333 is a wasteful number, since it uses less digits than its factorization.

216487333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344231.

The product of its digits is 72576, while the sum is 37.

The square root of 216487333 is about 14713.5085210836. The cubic root of 216487333 is about 600.4508953300.

The spelling of 216487333 in words is "two hundred sixteen million, four hundred eighty-seven thousand, three hundred thirty-three".