26220287 has 2 divisors, whose sum is σ = 26220288. Its totient is φ = 26220286.

The previous prime is 26220251. The next prime is 26220329. The reversal of 26220287 is 78202262.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26220287 - 2⁶ = 26220223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26226287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13110143 + 13110144.

It is an arithmetic number, because the mean of its divisors is an integer number (13110144).

Almost surely, 2^26220287 is an apocalyptic number.

26220287 is a deficient number, since it is larger than the sum of its proper divisors (1).

26220287 is an equidigital number, since it uses as much as digits as its factorization.

26220287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 26220287 is about 5120.5748700707. The cubic root of 26220287 is about 297.0839208560.

The spelling of 26220287 in words is "twenty-six million, two hundred twenty thousand, two hundred eighty-seven".