26163221 has 16 divisors (see below), whose sum is σ = 32402304. Its totient is φ = 20611584.

The previous prime is 26163169. The next prime is 26163223. The reversal of 26163221 is 12236162.

It is not a de Polignac number, because 26163221 - 2⁶ = 26163157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26163223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2561 + ... + 7673.

It is an arithmetic number, because the mean of its divisors is an integer number (2025144).

Almost surely, 2^26163221 is an apocalyptic number.

It is an amenable number.

26163221 is a deficient number, since it is larger than the sum of its proper divisors (6239083).

26163221 is a wasteful number, since it uses less digits than its factorization.

26163221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180.

The product of its digits is 864, while the sum is 23.

The square root of 26163221 is about 5114.9996089931. Note that the first 3 decimals coincide. The cubic root of 26163221 is about 296.8682391960.

Adding to 26163221 its reverse (12236162), we get a palindrome (38399383).

The spelling of 26163221 in words is "twenty-six million, one hundred sixty-three thousand, two hundred twenty-one".