2291273081 has 4 divisors (see below), whose sum is σ = 2307757200. Its totient is φ = 2274788964.

The previous prime is 2291273009. The next prime is 2291273111. The reversal of 2291273081 is 1803721922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2291273081 - 2¹⁴ = 2291256697 is a prime.

It is a super-2 number, since 2×2291273081² = 10499864663430465122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2291273381) 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 3 ways as a sum of consecutive naturals, for example, 8241851 + ... + 8242128.

It is an arithmetic number, because the mean of its divisors is an integer number (576939300).

Almost surely, 2^2291273081 is an apocalyptic number.

It is an amenable number.

2291273081 is a deficient number, since it is larger than the sum of its proper divisors (16484119).

2291273081 is a wasteful number, since it uses less digits than its factorization.

2291273081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16484118.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 2291273081 is about 47867.2443430787. The cubic root of 2291273081 is about 1318.3345005014.

The spelling of 2291273081 in words is "two billion, two hundred ninety-one million, two hundred seventy-three thousand, eighty-one".