26550013 has 6 divisors (see below), whose sum is σ = 30884766. Its totient is φ = 22757112.

The previous prime is 26549987. The next prime is 26550037. The reversal of 26550013 is 31005562.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24980004 + 1570009 = 4998^2 + 1253^2 .

It is a de Polignac number, because none of the positive numbers 2^k-26550013 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26550613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 270870 + ... + 270967.

It is an arithmetic number, because the mean of its divisors is an integer number (5147461).

Almost surely, 2^26550013 is an apocalyptic number.

It is an amenable number.

26550013 is a deficient number, since it is larger than the sum of its proper divisors (4334753).

26550013 is an equidigital number, since it uses as much as digits as its factorization.

26550013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541851 (or 541844 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 26550013 is about 5152.6704726773. The cubic root of 26550013 is about 298.3240360665.

Adding to 26550013 its reverse (31005562), we get a palindrome (57555575).

The spelling of 26550013 in words is "twenty-six million, five hundred fifty thousand, thirteen".