216265170 has 64 divisors (see below), whose sum is σ = 568912896. Its totient is φ = 52178880.

The previous prime is 216265169. The next prime is 216265183. The reversal of 216265170 is 71562612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73467 + ... + 76353.

It is an arithmetic number, because the mean of its divisors is an integer number (8889264).

Almost surely, 2^216265170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216265170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284456448).

216265170 is an abundant number, since it is smaller than the sum of its proper divisors (352647726).

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

216265170 is a wasteful number, since it uses less digits than its factorization.

216265170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3135.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 216265170 is about 14705.9569562814. The cubic root of 216265170 is about 600.2454273731.

It can be divided in two parts, 21626 and 5170, that added together give a triangular number (26796 = T₂₃₁).

The spelling of 216265170 in words is "two hundred sixteen million, two hundred sixty-five thousand, one hundred seventy".