2261565553243 has 4 divisors (see below), whose sum is σ = 2262211903000. Its totient is φ = 2260919203488.

The previous prime is 2261565553241. The next prime is 2261565553339. The reversal of 2261565553243 is 3423555651622.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2261565553243 - 2¹ = 2261565553241 is a prime.

It is a super-2 number, since 2×2261565553243² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2261565553241) 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, 323169630 + ... + 323176627.

It is an arithmetic number, because the mean of its divisors is an integer number (565552975750).

Almost surely, 2^{2261565553243} is an apocalyptic number.

2261565553243 is a deficient number, since it is larger than the sum of its proper divisors (646349757).

2261565553243 is an equidigital number, since it uses as much as digits as its factorization.

2261565553243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646349756.

The product of its digits is 6480000, while the sum is 49.

The spelling of 2261565553243 in words is "two trillion, two hundred sixty-one billion, five hundred sixty-five million, five hundred fifty-three thousand, two hundred forty-three".