216195481 has 8 divisors (see below), whose sum is σ = 217785600. Its totient is φ = 214611408.

The previous prime is 216195467. The next prime is 216195487. The reversal of 216195481 is 184591612.

216195481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216195481 - 2¹¹ = 216193433 is a prime.

It is a super-2 number, since 2×216195481² = 93480972009642722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216195481.

It is not an unprimeable number, because it can be changed into a prime (216195487) 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, 88920 + ... + 91318.

It is an arithmetic number, because the mean of its divisors is an integer number (27223200).

Almost surely, 2^216195481 is an apocalyptic number.

It is an amenable number.

216195481 is a deficient number, since it is larger than the sum of its proper divisors (1590119).

216195481 is a wasteful number, since it uses less digits than its factorization.

216195481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3023.

The product of its digits is 17280, while the sum is 37.

The square root of 216195481 is about 14703.5873513915. The cubic root of 216195481 is about 600.1809463511.

The spelling of 216195481 in words is "two hundred sixteen million, one hundred ninety-five thousand, four hundred eighty-one".