170216816 has 40 divisors (see below), whose sum is σ = 411176064. Its totient is φ = 66317760.

The previous prime is 170216773. The next prime is 170216819. The reversal of 170216816 is 618612071.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170216819) 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, 67850 + ... + 70313.

Almost surely, 2^170216816 is an apocalyptic number.

170216816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

170216816 is an abundant number, since it is smaller than the sum of its proper divisors (240959248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

170216816 is a wasteful number, since it uses less digits than its factorization.

170216816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138189 (or 138183 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 170216816 is about 13046.7166750873. The cubic root of 170216816 is about 554.2012327909.

Adding to 170216816 its reverse (618612071), we get a palindrome (788828887).

The spelling of 170216816 in words is "one hundred seventy million, two hundred sixteen thousand, eight hundred sixteen".