216145313 has 8 divisors (see below), whose sum is σ = 217753536. Its totient is φ = 214542000.

The previous prime is 216145309. The next prime is 216145331. The reversal of 216145313 is 313541612.

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 216145313 - 2² = 216145309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216145393) 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 7 ways as a sum of consecutive naturals, for example, 148238 + ... + 149688.

It is an arithmetic number, because the mean of its divisors is an integer number (27219192).

Almost surely, 2^216145313 is an apocalyptic number.

It is an amenable number.

216145313 is a deficient number, since it is larger than the sum of its proper divisors (1608223).

216145313 is a wasteful number, since it uses less digits than its factorization.

216145313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455.

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

The square root of 216145313 is about 14701.8812741771. The cubic root of 216145313 is about 600.1345189129.

Adding to 216145313 its reverse (313541612), we get a palindrome (529686925).

It can be divided in two parts, 2161 and 45313, that added together give a palindrome (47474).

The spelling of 216145313 in words is "two hundred sixteen million, one hundred forty-five thousand, three hundred thirteen".