2881231 has 4 divisors (see below), whose sum is σ = 2900464. Its totient is φ = 2862000.

The previous prime is 2881183. The next prime is 2881243. The reversal of 2881231 is 1321882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1321882 = 2 ⋅660941.

It is a cyclic number.

It is not a de Polignac number, because 2881231 - 2⁹ = 2880719 is a prime.

It is a super-2 number, since 2×2881231² = 16602984150722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2881196 and 2881205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2881261) 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, 9390 + ... + 9691.

It is an arithmetic number, because the mean of its divisors is an integer number (725116).

2^2881231 is an apocalyptic number.

2881231 is a deficient number, since it is larger than the sum of its proper divisors (19233).

2881231 is a wasteful number, since it uses less digits than its factorization.

2881231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19232.

The product of its digits is 768, while the sum is 25.

The square root of 2881231 is about 1697.4189229533. The cubic root of 2881231 is about 142.2960002906.

The spelling of 2881231 in words is "two million, eight hundred eighty-one thousand, two hundred thirty-one".