216953396 has 12 divisors (see below), whose sum is σ = 414183840. Its totient is φ = 98615160.

The previous prime is 216953383. The next prime is 216953453. The reversal of 216953396 is 693359612.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 4930759 = 216953396 / (2 + 1 + 6 + 9 + 5 + 3 + 3 + 9 + 6).

It is a congruent number.

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, 2465336 + ... + 2465423.

It is an arithmetic number, because the mean of its divisors is an integer number (34515320).

Almost surely, 2^216953396 is an apocalyptic number.

It is an amenable number.

216953396 is a deficient number, since it is larger than the sum of its proper divisors (197230444).

216953396 is a wasteful number, since it uses less digits than its factorization.

216953396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4930774 (or 4930772 counting only the distinct ones).

The product of its digits is 262440, while the sum is 44.

The square root of 216953396 is about 14729.3379348836. The cubic root of 216953396 is about 600.8814784328.

The spelling of 216953396 in words is "two hundred sixteen million, nine hundred fifty-three thousand, three hundred ninety-six".