26222591 has 2 divisors, whose sum is σ = 26222592. Its totient is φ = 26222590.

The previous prime is 26222513. The next prime is 26222617. The reversal of 26222591 is 19522262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26222591 - 2²² = 22028287 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 (26222191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13111295 + 13111296.

It is an arithmetic number, because the mean of its divisors is an integer number (13111296).

Almost surely, 2^26222591 is an apocalyptic number.

26222591 is a deficient number, since it is larger than the sum of its proper divisors (1).

26222591 is an equidigital number, since it uses as much as digits as its factorization.

26222591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 26222591 is about 5120.7998398688. The cubic root of 26222591 is about 297.0926222775.

The spelling of 26222591 in words is "twenty-six million, two hundred twenty-two thousand, five hundred ninety-one".