216474 has 16 divisors (see below), whose sum is σ = 438240. Its totient is φ = 71280.

The previous prime is 216451. The next prime is 216481. The reversal of 216474 is 474612.

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, 489 + ... + 819.

It is an arithmetic number, because the mean of its divisors is an integer number (27390).

2²¹⁶⁴⁷⁴ is an apocalyptic number.

216474 is an abundant number, since it is smaller than the sum of its proper divisors (221766).

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

216474 is a wasteful number, since it uses less digits than its factorization.

216474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445.

The product of its digits is 1344, while the sum is 24.

The square root of 216474 is about 465.2676648984. The cubic root of 216474 is about 60.0438568241.

The spelling of 216474 in words is "two hundred sixteen thousand, four hundred seventy-four".