26481213 has 18 divisors (see below), whose sum is σ = 42045822. Its totient is φ = 16048560.

The previous prime is 26481209. The next prime is 26481227. The reversal of 26481213 is 31218462.

26481213 is a `hidden beast` number, since 2 + 648 + 1 + 2 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24176889 + 2304324 = 4917^2 + 1518^2 .

It is not a de Polignac number, because 26481213 - 2² = 26481209 is a prime.

It is a Smith number, since the sum of its digits (27) 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 (26481293) 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 17 ways as a sum of consecutive naturals, for example, 11070 + ... + 13247.

It is an arithmetic number, because the mean of its divisors is an integer number (2335879).

Almost surely, 2^26481213 is an apocalyptic number.

It is an amenable number.

26481213 is a deficient number, since it is larger than the sum of its proper divisors (15564609).

26481213 is a wasteful number, since it uses less digits than its factorization.

26481213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24345 (or 24331 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 26481213 is about 5145.9899922172. The cubic root of 26481213 is about 298.0661272406.

Adding to 26481213 its reverse (31218462), we get a palindrome (57699675).

The spelling of 26481213 in words is "twenty-six million, four hundred eighty-one thousand, two hundred thirteen".