2831081 has 4 divisors (see below), whose sum is σ = 3088464. Its totient is φ = 2573700.

The previous prime is 2831069. The next prime is 2831089. The reversal of 2831081 is 1801382.

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 2831081 - 2¹⁴ = 2814697 is a prime.

It is a super-2 number, since 2×2831081² = 16030039257122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2831089) 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, 128675 + ... + 128696.

It is an arithmetic number, because the mean of its divisors is an integer number (772116).

2^2831081 is an apocalyptic number.

It is an amenable number.

2831081 is a deficient number, since it is larger than the sum of its proper divisors (257383).

2831081 is a wasteful number, since it uses less digits than its factorization.

2831081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257382.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 2831081 is about 1682.5816473503. The cubic root of 2831081 is about 141.4655736649.

The spelling of 2831081 in words is "two million, eight hundred thirty-one thousand, eighty-one".