26172231 has 16 divisors (see below), whose sum is σ = 37322208. Its totient is φ = 16256000.

The previous prime is 26172221. The next prime is 26172257. The reversal of 26172231 is 13227162.

It is a cyclic number.

It is not a de Polignac number, because 26172231 - 2⁵ = 26172199 is a prime.

It is a super-2 number, since 2×26172231² = 1369971351034722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26172221) 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, 2611 + ... + 7691.

It is an arithmetic number, because the mean of its divisors is an integer number (2332638).

Almost surely, 2^26172231 is an apocalyptic number.

26172231 is a deficient number, since it is larger than the sum of its proper divisors (11149977).

26172231 is a wasteful number, since it uses less digits than its factorization.

26172231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5202.

The product of its digits is 1008, while the sum is 24.

The square root of 26172231 is about 5115.8802761597. The cubic root of 26172231 is about 296.9023134390.

Adding to 26172231 its reverse (13227162), we get a palindrome (39399393).

The spelling of 26172231 in words is "twenty-six million, one hundred seventy-two thousand, two hundred thirty-one".