216147806 has 16 divisors (see below), whose sum is σ = 371037024. Its totient is φ = 92510304.

The previous prime is 216147787. The next prime is 216147889. The reversal of 216147806 is 608741612.

It is a super-2 number, since 2×216147806² = 93439748077227272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836 + ... + 20808.

It is an arithmetic number, because the mean of its divisors is an integer number (23189814).

Almost surely, 2^216147806 is an apocalyptic number.

216147806 is a deficient number, since it is larger than the sum of its proper divisors (154889218).

216147806 is a wasteful number, since it uses less digits than its factorization.

216147806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20755.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 216147806 is about 14701.9660590004. The cubic root of 216147806 is about 600.1368262027.

The spelling of 216147806 in words is "two hundred sixteen million, one hundred forty-seven thousand, eight hundred six".