26216217 has 20 divisors (see below), whose sum is σ = 39324516. Its totient is φ = 17405280.

The previous prime is 26216213. The next prime is 26216231. The reversal of 26216217 is 71261262.

It can be written as a sum of positive squares in 2 ways, for example, as 7241481 + 18974736 = 2691^2 + 4356^2 .

It is not a de Polignac number, because 26216217 - 2² = 26216213 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (26216213) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25167 + ... + 26187.

Almost surely, 2^26216217 is an apocalyptic number.

26216217 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

26216217 is a deficient number, since it is larger than the sum of its proper divisors (13108299).

26216217 is a wasteful number, since it uses less digits than its factorization.

26216217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350 (or 1341 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 26216217 is about 5120.1774383316. The cubic root of 26216217 is about 297.0685486097.

Adding to 26216217 its reverse (71261262), we get a palindrome (97477479).

The spelling of 26216217 in words is "twenty-six million, two hundred sixteen thousand, two hundred seventeen".