216377806 has 8 divisors (see below), whose sum is σ = 332114904. Its totient is φ = 105672840.

The previous prime is 216377789. The next prime is 216377807. The reversal of 216377806 is 608773612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216377807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257925 + ... + 1258096.

It is an arithmetic number, because the mean of its divisors is an integer number (41514363).

Almost surely, 2^216377806 is an apocalyptic number.

216377806 is a deficient number, since it is larger than the sum of its proper divisors (115737098).

216377806 is a wasteful number, since it uses less digits than its factorization.

216377806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516066.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 216377806 is about 14709.7860623464. The cubic root of 216377806 is about 600.3496166112.

The spelling of 216377806 in words is "two hundred sixteen million, three hundred seventy-seven thousand, eight hundred six".