216259394 has 8 divisors (see below), whose sum is σ = 349342140. Its totient is φ = 99812016.

The previous prime is 216259369. The next prime is 216259423. The reversal of 216259394 is 493952612.

It can be written as a sum of positive squares in 2 ways, for example, as 178890625 + 37368769 = 13375^2 + 6113^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4158809 + ... + 4158860.

Almost surely, 2^216259394 is an apocalyptic number.

216259394 is a deficient number, since it is larger than the sum of its proper divisors (133082746).

216259394 is a wasteful number, since it uses less digits than its factorization.

216259394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8317684.

The product of its digits is 116640, while the sum is 41.

The square root of 216259394 is about 14705.7605719663. The cubic root of 216259394 is about 600.2400835500.

The spelling of 216259394 in words is "two hundred sixteen million, two hundred fifty-nine thousand, three hundred ninety-four".