216146772 has 48 divisors (see below), whose sum is σ = 593349120.
Its totient is φ = 67810176.
The previous prime is 216146771. The next prime is 216146837. The reversal of 216146772 is 277641612.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (216146771) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57028 + ... + 60699.
It is an arithmetic number, because the mean of its divisors is an integer number (12361440).
Almost surely, 2216146772 is an apocalyptic number.
It is an amenable number.
216146772 is an abundant number, since it is smaller than the sum of its proper divisors (377202348).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
216146772 is a wasteful number, since it uses less digits than its factorization.
216146772 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 117757 (or 117749 counting only the distinct ones).
The product of its digits is 28224, while the sum is 36.
The square root of 216146772 is about 14701.9308935935.
The cubic root of 216146772 is about 600.1358692303.
The spelling of 216146772 in words is "two hundred sixteen million, one hundred forty-six thousand, seven hundred seventy-two".