216739371 has 8 divisors (see below), whose sum is σ = 289715344. Its totient is φ = 144128160.

The previous prime is 216739363. The next prime is 216739381. The reversal of 216739371 is 173937612.

It is a happy number.

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

It is not a de Polignac number, because 216739371 - 2³ = 216739363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216739331) 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, 89800 + ... + 92181.

It is an arithmetic number, because the mean of its divisors is an integer number (36214418).

Almost surely, 2^216739371 is an apocalyptic number.

216739371 is a deficient number, since it is larger than the sum of its proper divisors (72975973).

216739371 is a wasteful number, since it uses less digits than its factorization.

216739371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182381.

The product of its digits is 47628, while the sum is 39.

The square root of 216739371 is about 14722.0708801445. The cubic root of 216739371 is about 600.6838231249.

The spelling of 216739371 in words is "two hundred sixteen million, seven hundred thirty-nine thousand, three hundred seventy-one".