26131217 has 4 divisors (see below), whose sum is σ = 29864256. Its totient is φ = 22398180.

The previous prime is 26131211. The next prime is 26131223. The reversal of 26131217 is 71213162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (26131211) and next prime (26131223).

It is not a de Polignac number, because 26131217 - 2¹² = 26127121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26131192 and 26131201.

It is not an unprimeable number, because it can be changed into a prime (26131211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1866509 + ... + 1866522.

It is an arithmetic number, because the mean of its divisors is an integer number (7466064).

Almost surely, 2^26131217 is an apocalyptic number.

It is an amenable number.

26131217 is a deficient number, since it is larger than the sum of its proper divisors (3733039).

26131217 is an equidigital number, since it uses as much as digits as its factorization.

26131217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733038.

The product of its digits is 504, while the sum is 23.

The square root of 26131217 is about 5111.8702057075. The cubic root of 26131217 is about 296.7471423865.

Adding to 26131217 its reverse (71213162), we get a palindrome (97344379).

The spelling of 26131217 in words is "twenty-six million, one hundred thirty-one thousand, two hundred seventeen".