2271265581 has 16 divisors (see below), whose sum is σ = 3269710080. Its totient is φ = 1394099520.

The previous prime is 2271265559. The next prime is 2271265583. The reversal of 2271265581 is 1855621722.

It is not a de Polignac number, because 2271265581 - 2¹⁵ = 2271232813 is a prime.

It is a super-2 number, since 2×2271265581² = 10317294678870535122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271265583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59685 + ... + 90026.

It is an arithmetic number, because the mean of its divisors is an integer number (204356880).

Almost surely, 2^2271265581 is an apocalyptic number.

It is an amenable number.

2271265581 is a deficient number, since it is larger than the sum of its proper divisors (998444499).

2271265581 is a wasteful number, since it uses less digits than its factorization.

2271265581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150116.

The product of its digits is 67200, while the sum is 39.

The square root of 2271265581 is about 47657.7966444107. The cubic root of 2271265581 is about 1314.4860248538.

The spelling of 2271265581 in words is "two billion, two hundred seventy-one million, two hundred sixty-five thousand, five hundred eighty-one".