26221851 has 12 divisors (see below), whose sum is σ = 38020320. Its totient is φ = 17414640.

The previous prime is 26221849. The next prime is 26221861. The reversal of 26221851 is 15812262.

It is a happy number.

It is not a de Polignac number, because 26221851 - 2¹ = 26221849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26221801) 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 11 ways as a sum of consecutive naturals, for example, 2995 + ... + 7836.

It is an arithmetic number, because the mean of its divisors is an integer number (3168360).

Almost surely, 2^26221851 is an apocalyptic number.

26221851 is a deficient number, since it is larger than the sum of its proper divisors (11798469).

26221851 is a wasteful number, since it uses less digits than its factorization.

26221851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11106 (or 11103 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 26221851 is about 5120.7275850215. The cubic root of 26221851 is about 297.0898276056.

It can be divided in two parts, 26221 and 851, that added together give a palindrome (27072).

The spelling of 26221851 in words is "twenty-six million, two hundred twenty-one thousand, eight hundred fifty-one".