2311223561 has 8 divisors (see below), whose sum is σ = 2340848160. Its totient is φ = 2281641472.

The previous prime is 2311223549. The next prime is 2311223617. The reversal of 2311223561 is 1653221132.

It is a happy number.

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 2311223561 - 2³⁰ = 1237481737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2311223561.

It is not an unprimeable number, because it can be changed into a prime (2311223531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107066 + ... + 126828.

It is an arithmetic number, because the mean of its divisors is an integer number (292606020).

Almost surely, 2^2311223561 is an apocalyptic number.

It is an amenable number.

2311223561 is a deficient number, since it is larger than the sum of its proper divisors (29624599).

2311223561 is a wasteful number, since it uses less digits than its factorization.

2311223561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21255.

The product of its digits is 2160, while the sum is 26.

The square root of 2311223561 is about 48075.1865414998. The cubic root of 2311223561 is about 1322.1497646869.

Adding to 2311223561 its reverse (1653221132), we get a palindrome (3964444693).

The spelling of 2311223561 in words is "two billion, three hundred eleven million, two hundred twenty-three thousand, five hundred sixty-one".