26223723221 has 4 divisors (see below), whose sum is σ = 27603919200. Its totient is φ = 24843527244.

The previous prime is 26223723209. The next prime is 26223723241. The reversal of 26223723221 is 12232732262.

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 a cyclic number.

It is not a de Polignac number, because 26223723221 - 2⁶ = 26223723157 is a prime.

It is a super-2 number, since 2×26223723221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26223723241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690097961 + ... + 690097998.

It is an arithmetic number, because the mean of its divisors is an integer number (6900979800).

Almost surely, 2^26223723221 is an apocalyptic number.

It is an amenable number.

26223723221 is a deficient number, since it is larger than the sum of its proper divisors (1380195979).

26223723221 is a wasteful number, since it uses less digits than its factorization.

26223723221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380195978.

The product of its digits is 24192, while the sum is 32.

The spelling of 26223723221 in words is "twenty-six billion, two hundred twenty-three million, seven hundred twenty-three thousand, two hundred twenty-one".