26221797 has 12 divisors (see below), whose sum is σ = 43286880. Its totient is φ = 14983848.

The previous prime is 26221781. The next prime is 26221799. The reversal of 26221797 is 79712262.

It is not a de Polignac number, because 26221797 - 2⁴ = 26221781 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26221799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208047 + ... + 208172.

It is an arithmetic number, because the mean of its divisors is an integer number (3607240).

Almost surely, 2^26221797 is an apocalyptic number.

It is an amenable number.

26221797 is a deficient number, since it is larger than the sum of its proper divisors (17065083).

26221797 is a wasteful number, since it uses less digits than its factorization.

26221797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416232 (or 416229 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 26221797 is about 5120.7223123306. The cubic root of 26221797 is about 297.0896236681.

The spelling of 26221797 in words is "twenty-six million, two hundred twenty-one thousand, seven hundred ninety-seven".