26853221 has 2 divisors, whose sum is σ = 26853222. Its totient is φ = 26853220.

The previous prime is 26853193. The next prime is 26853257. The reversal of 26853221 is 12235862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20376196 + 6477025 = 4514^2 + 2545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26853221 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26853721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13426610 + 13426611.

It is an arithmetic number, because the mean of its divisors is an integer number (13426611).

Almost surely, 2^26853221 is an apocalyptic number.

It is an amenable number.

26853221 is a deficient number, since it is larger than the sum of its proper divisors (1).

26853221 is an equidigital number, since it uses as much as digits as its factorization.

26853221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 26853221 is about 5182.0093593123. The cubic root of 26853221 is about 299.4553859910.

The spelling of 26853221 in words is "twenty-six million, eight hundred fifty-three thousand, two hundred twenty-one".