2719281 has 4 divisors (see below), whose sum is σ = 3625712. Its totient is φ = 1812852.

The previous prime is 2719273. The next prime is 2719291. The reversal of 2719281 is 1829172.

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 not a de Polignac number, because 2719281 - 2³ = 2719273 is a prime.

It is a super-2 number, since 2×2719281² = 14788978313922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

2719281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2719231) 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, 453211 + ... + 453216.

It is an arithmetic number, because the mean of its divisors is an integer number (906428).

2^2719281 is an apocalyptic number.

It is an amenable number.

2719281 is a deficient number, since it is larger than the sum of its proper divisors (906431).

2719281 is an equidigital number, since it uses as much as digits as its factorization.

2719281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906430.

The product of its digits is 2016, while the sum is 30.

The square root of 2719281 is about 1649.0242569471. The cubic root of 2719281 is about 139.5783401397.

The spelling of 2719281 in words is "two million, seven hundred nineteen thousand, two hundred eighty-one".