2271661131 has 4 divisors (see below), whose sum is σ = 3028881512. Its totient is φ = 1514440752.

The previous prime is 2271661127. The next prime is 2271661141. The reversal of 2271661131 is 1311661722.

2271661131 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2271661131 - 2² = 2271661127 is a prime.

It is a super-2 number, since 2×2271661131² = 10320888588192398322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2271661111) 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, 378610186 + ... + 378610191.

It is an arithmetic number, because the mean of its divisors is an integer number (757220378).

Almost surely, 2^2271661131 is an apocalyptic number.

2271661131 is a deficient number, since it is larger than the sum of its proper divisors (757220381).

2271661131 is an equidigital number, since it uses as much as digits as its factorization.

2271661131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757220380.

The product of its digits is 3024, while the sum is 30.

The square root of 2271661131 is about 47661.9463618514. The cubic root of 2271661131 is about 1314.5623280935.

The spelling of 2271661131 in words is "two billion, two hundred seventy-one million, six hundred sixty-one thousand, one hundred thirty-one".