216262447 has 4 divisors (see below), whose sum is σ = 222107416. Its totient is φ = 210417480.

The previous prime is 216262441. The next prime is 216262469. The reversal of 216262447 is 744262612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216262447 - 2¹⁵ = 216229679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216262441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2922429 + ... + 2922502.

It is an arithmetic number, because the mean of its divisors is an integer number (55526854).

Almost surely, 2^216262447 is an apocalyptic number.

216262447 is a deficient number, since it is larger than the sum of its proper divisors (5844969).

216262447 is an equidigital number, since it uses as much as digits as its factorization.

216262447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5844968.

The product of its digits is 32256, while the sum is 34.

The square root of 216262447 is about 14705.8643744596. The cubic root of 216262447 is about 600.2429081276.

The spelling of 216262447 in words is "two hundred sixteen million, two hundred sixty-two thousand, four hundred forty-seven".