216194465 has 16 divisors (see below), whose sum is σ = 268262400. Its totient is φ = 167088960.

The previous prime is 216194453. The next prime is 216194471. The reversal of 216194465 is 564491612.

It is not a de Polignac number, because 216194465 - 2²² = 212000161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153836 + ... + 155234.

It is an arithmetic number, because the mean of its divisors is an integer number (16766400).

Almost surely, 2^216194465 is an apocalyptic number.

It is an amenable number.

216194465 is a deficient number, since it is larger than the sum of its proper divisors (52067935).

216194465 is a wasteful number, since it uses less digits than its factorization.

216194465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432.

The product of its digits is 51840, while the sum is 38.

The square root of 216194465 is about 14703.5528019591. The cubic root of 216194465 is about 600.1800061761.

The spelling of 216194465 in words is "two hundred sixteen million, one hundred ninety-four thousand, four hundred sixty-five".