2271436261 has 4 divisors (see below), whose sum is σ = 2271531724. Its totient is φ = 2271340800.

The previous prime is 2271436259. The next prime is 2271436267. The reversal of 2271436261 is 1626341722.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1626341722 = 2 ⋅813170861.

It can be written as a sum of positive squares in 2 ways, for example, as 565250625 + 1706185636 = 23775^2 + 41306^2 .

It is a cyclic number.

It is not a de Polignac number, because 2271436261 - 2¹ = 2271436259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271436267) 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, 19951 + ... + 70291.

It is an arithmetic number, because the mean of its divisors is an integer number (567882931).

Almost surely, 2^2271436261 is an apocalyptic number.

It is an amenable number.

2271436261 is a deficient number, since it is larger than the sum of its proper divisors (95463).

2271436261 is an equidigital number, since it uses as much as digits as its factorization.

2271436261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95462.

The product of its digits is 24192, while the sum is 34.

The square root of 2271436261 is about 47659.5872936390. The cubic root of 2271436261 is about 1314.5189508220.

Adding to 2271436261 its reverse (1626341722), we get a palindrome (3897777983).

The spelling of 2271436261 in words is "two billion, two hundred seventy-one million, four hundred thirty-six thousand, two hundred sixty-one".