26160221 has 12 divisors (see below), whose sum is σ = 27301428. Its totient is φ = 25062912.

The previous prime is 26160209. The next prime is 26160259. The reversal of 26160221 is 12206162.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 12180100 + 13980121 = 3490^2 + 3739^2 .

It is not a de Polignac number, because 26160221 - 2¹⁰ = 26159197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26160193 and 26160202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26160271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132695 + ... + 132891.

It is an arithmetic number, because the mean of its divisors is an integer number (2275119).

Almost surely, 2^26160221 is an apocalyptic number.

It is an amenable number.

26160221 is a deficient number, since it is larger than the sum of its proper divisors (1141207).

26160221 is an equidigital number, since it uses as much as digits as its factorization.

26160221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 26160221 is about 5114.7063454318. The cubic root of 26160221 is about 296.8568919851.

Adding to 26160221 its reverse (12206162), we get a palindrome (38366383).

The spelling of 26160221 in words is "twenty-six million, one hundred sixty thousand, two hundred twenty-one".