26288221 has 2 divisors, whose sum is σ = 26288222. Its totient is φ = 26288220.

The previous prime is 26288209. The next prime is 26288233. The reversal of 26288221 is 12288262.

It is a balanced prime because it is at equal distance from previous prime (26288209) and next prime (26288233).

It can be written as a sum of positive squares in only one way, i.e., 24860196 + 1428025 = 4986^2 + 1195^2 .

It is a cyclic number.

It is not a de Polignac number, because 26288221 - 2¹³ = 26280029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26288281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13144110 + 13144111.

It is an arithmetic number, because the mean of its divisors is an integer number (13144111).

Almost surely, 2^26288221 is an apocalyptic number.

It is an amenable number.

26288221 is a deficient number, since it is larger than the sum of its proper divisors (1).

26288221 is an equidigital number, since it uses as much as digits as its factorization.

26288221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 31.

The square root of 26288221 is about 5127.2040138852. The cubic root of 26288221 is about 297.3402706336.

The spelling of 26288221 in words is "twenty-six million, two hundred eighty-eight thousand, two hundred twenty-one".