26420231 has 2 divisors, whose sum is σ = 26420232. Its totient is φ = 26420230.

The previous prime is 26420213. The next prime is 26420239. The reversal of 26420231 is 13202462.

Together with previous prime (26420213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26420231 - 2⁶ = 26420167 is a prime.

It is a super-2 number, since 2×26420231² = 1396057212186722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26420239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13210115 + 13210116.

It is an arithmetic number, because the mean of its divisors is an integer number (13210116).

Almost surely, 2^26420231 is an apocalyptic number.

26420231 is a deficient number, since it is larger than the sum of its proper divisors (1).

26420231 is an equidigital number, since it uses as much as digits as its factorization.

26420231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 26420231 is about 5140.0613809565. The cubic root of 26420231 is about 297.8371518395.

Adding to 26420231 its reverse (13202462), we get a palindrome (39622693).

The spelling of 26420231 in words is "twenty-six million, four hundred twenty thousand, two hundred thirty-one".