26342225221 has 8 divisors (see below), whose sum is σ = 29135268344. Its totient is φ = 23658713280.

The previous prime is 26342225207. The next prime is 26342225249. The reversal of 26342225221 is 12252224362.

It can be written as a sum of positive squares in 4 ways, for example, as 8235562500 + 18106662721 = 90750^2 + 134561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26342225221 - 2⁹ = 26342224709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26342225621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27382290 + ... + 27383251.

It is an arithmetic number, because the mean of its divisors is an integer number (3641908543).

Almost surely, 2^26342225221 is an apocalyptic number.

It is an amenable number.

26342225221 is a deficient number, since it is larger than the sum of its proper divisors (2793043123).

26342225221 is a wasteful number, since it uses less digits than its factorization.

26342225221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54765591.

The product of its digits is 23040, while the sum is 31.

Adding to 26342225221 its reverse (12252224362), we get a palindrome (38594449583).

The spelling of 26342225221 in words is "twenty-six billion, three hundred forty-two million, two hundred twenty-five thousand, two hundred twenty-one".